Meteorite questions answered

No. A shooting star is a tiny bit of space dust burning up high in our air. Real stars are giant balls of hot gas, very far away.

Most meteorites are black or dark brown on the outside. Inside, they can be grey, silver, black, white or even have green crystals.

Wishing on a shooting star is an old tradition from many parts of the world. It is fun to do, but the meteor itself cannot make wishes come true.

A meteorite often feels heavier than you expect for its size. Its crust can feel smooth or a little rough, and iron ones feel cold and solid, like a lump of metal.

Most meteorites in museums have no smell. Some people who picked up freshly fallen meteorites have said they smelled a little like matches or burnt rock.

No. Meteorites only glow while they are falling through the air. Once they land and cool down, they are dark, ordinary-looking rocks.

No living things, alien or otherwise, have ever been found in meteorites. But some meteorites contain chemicals that are building blocks of life.

No. Meteorites are rocks and metal, so they are heavier than water and sink straight to the bottom.

On an ordinary dark night you might see a handful each hour. During a big meteor shower, you could see dozens in an hour.

Shooting stars are made by tiny specks of dust that move so fast through our air that they burn away almost instantly.

Inside, a meteorite is made of minerals and often shiny bits of metal. Many contain little round grains called chondrules, and some are almost solid iron.

Please don't. Breaking a meteorite can spoil it for science and hurt you. Experts cut meteorites carefully with special saws when needed.

Yes! The biggest meteorite ever found, Hoba in Namibia, is about the size of a small car and weighs around 60 tonnes, heavier than five buses full of people.

Very probably, a tiny amount. Thousands of tonnes of space dust land on Earth every year, and a few grains could settle anywhere, even on your windowsill.

Look closely, take a photo, ask an adult to help, and compare it with pictures of real meteorites. Most strange beach rocks are Earth rocks, but they can still be interesting.

A small meteorite would make a splash and sink to the bottom. Only a very large asteroid would cause big waves.

Earth has been hit just as often, but wind, rain, rivers, plants and moving continents slowly wipe craters away. The Moon has no weather, so its craters last for billions of years.

Yes. Astronauts on the International Space Station look down on shooting stars, seeing them glow in the air below them.

Yes. Tiny specks of dust often hit spacecraft, and they are designed with shields to cope. Large hits are very rare.

Yes. Any planet or moon with air can have shooting stars. Mars, Venus and the giant planets all get them.

Usually not. Meteorites are named after the place where they fell or were found, such as a town, a river or a hill.

Yes. Meteorites are much rarer than gold. Scientists have named more than 70,000 of them, and most are small.

A comet is a big icy ball travelling around the Sun, often with a glowing tail. A shooting star is a tiny bit of dust burning up in our air in a flash.

Yes, meteor showers are completely safe to watch. The meteors burn up far above you. Just stay warm, go with an adult and be careful in the dark.

Your eyes slowly adjust to darkness, opening your pupils and making special light-catching chemicals. After about 20 to 30 minutes, you can see many more stars and meteors.

Many natural history museums have a meteorite you are allowed to touch. Some schools, science centres and astronomy clubs also bring meteorites to visit.

No meteorite is made of gold. Some contain tiny traces of gold and platinum, but they are mostly rock, iron and nickel.

No. Icy space objects, like bits of comets, melt or burn up before they reach the ground. But some meteorites have water locked inside their minerals.

You would see a rocky, dusty, cratered ground under a black sky, with the Sun shining brightly. Gravity would be so weak you could jump into space!

Many stony meteorites travelled through space as small rocks for a few million to tens of millions of years. Some iron ones travelled for hundreds of millions of years.

Yes, a few times. A meteorite hit a parked car in Peekskill, USA, in 1992, and others have crashed through roofs. Nobody was badly hurt.

Yes! Drop pebbles or marbles into a tray of flour topped with cocoa powder, and you will make craters with rays, just like on the Moon.

Shooting stars happen in the daytime too, but the sky is too bright to see most of them. Only very bright fireballs can sometimes be seen in daylight.

Billions and billions. Astronomers have found more than a million asteroids, and there are countless smaller pieces, down to specks of dust.

Jupiter. Its enormous size and strong gravity pull in more comets and asteroids than any other planet.

No. Big asteroid strikes are extremely rare, and astronomers are watching the sky to find any that could come close. Scientists have even practised pushing one off course.

No, never. Meteorites can be dusty, rusty and dirty, some contain chemicals that are not good to eat, and licking spoils them for science.

If it is important, scientists study it, give it an official name and often keep a piece in a museum. The rest may be kept by the finder or landowner.

Keep asking questions, enjoy science and maths at school, and later study subjects like geology, chemistry, physics or planetary science at university.

A meteorite! Many are about 4.5 billion years old, older than any rock on Earth and older than the Earth itself.

Tiny space rocks are leftovers from when the planets formed, so they help scientists learn how Earth was made and where water and life's ingredients came from.

The biggest known is Vredefort in South Africa. It was once about 160 to 300 kilometres across and is about 2 billion years old.

It is possible, but extremely unlikely. Only a handful of houses in the world are known to have been hit by meteorites.

A meteor shower happens when Earth passes through a trail of dust left by a comet. Earth crosses the same trail at the same time each year.

Yes. People have watched meteorites fall for thousands of years, and some old meteorites were kept in churches and temples as special objects.

The asteroid belt is a huge, mostly empty region between Mars and Jupiter where millions of rocky bodies orbit the Sun, usually very far apart.

When big space rocks hit Mars, they can blast pieces of Mars into space. A few of these pieces, after drifting for millions of years, land on Earth.

A grown-up, warm clothes, a blanket or reclining chair, a red torch, a snack and a warm drink. No telescope needed!

Yes. Meteorites fall everywhere, including at the poles. Antarctica is the best place on Earth to find them.

A crater is a round hollow in the ground made when a fast space rock smashes into a planet or moon. Volcanoes can make craters too.

Yes! Astronauts found a meteorite on the Moon in 1969, and rovers on Mars have found several iron meteorites lying on the surface.

Asteroids are made of rock, metal, or a mixture of both. Some dark ones contain water locked in clay and carbon-rich chemicals.

Most asteroids are too small for their gravity to pull them into a ball, so they stay lumpy, like potatoes or peanuts.

A comet is made of ice, dust and rock, like a dirty snowball. When it gets close to the Sun, its ice turns to gas and makes a glowing cloud and tails.

Yes! Shooting stars have been happening for billions of years, so dinosaurs would have seen them on clear nights, just as we do.

Yes, in a way. In Sweden, scientists have found more than 100 'fossil meteorites' in limestone about 467 million years old.

Many asteroids are rubble piles, loose heaps of rocks and dust with gaps between, while others are solid rock or metal.

Maybe! Robots have already landed on asteroids. Sending people would be hard, but space agencies have studied it, and you could help make it happen.

About 4.6 billion years ago, a cloud of gas and dust collapsed. The Sun formed in the middle, and the leftover dust clumped together to make planets, moons and asteroids.

The dark patches are huge plains of dark volcanic rock called maria, made when lava flooded giant craters billions of years ago.

Yes, but only the brighter ones. City lights hide faint meteors, so you will see many more from a dark place in the countryside.

No. Gold is much heavier for its size than any meteorite. Even iron meteorites weigh only about 40 per cent as much as the same-sized lump of gold.

Mix modelling clay or salt dough with small beads for chondrules and silver glitter for metal, shape it into a lump and paint the outside black for fusion crust.

Apollo astronauts used special tongs, rakes, scoops, hammers and tubes, and sealed rocks in bags and boxes to bring them home.

Possibly. Some museums let you touch Moon rock, and lunar meteorites, pieces of the Moon that fell to Earth, are sometimes shown in schools and museums.

Mars is red because its dust and rocks contain lots of iron oxide, which is basically rust.

Yes! Children can learn to recognise meteorites, help search fields with adults, watch for fireballs and report them. Sharp eyes matter more than age.

As the space dust burns, it leaves a line of glowing hot air behind it. Bright meteors can leave a glowing trail that stays for seconds or even minutes.

There is no single answer, but famous ones include Hoba, the biggest; ALH 84001 from Mars; Allende and Murchison, full of clues to the early Solar System; and Winchcombe in Britain.

Yes. Meteorites can be rounded, blocky, cone-shaped or broken fragments. Their shape is changed by melting and breaking as they fall.

Impossibly fast! The slowest shooting stars travel about 11 kilometres every second, which is over a thousand times faster than the fastest human runner.

Yes. Some bright asteroids, such as Vesta and Ceres, can be seen with binoculars or a small telescope. They look like tiny stars that move slowly from night to night.

A dwarf planet is a world that orbits the Sun and is round, but is not big enough to clear other objects out of its path. Pluto and Ceres are dwarf planets.

It was mostly destroyed in the impact, vaporising and melting. It left a huge crater, now buried under Mexico, and a thin layer of dust around the world.

Finding a meteorite is very rare, so it feels lucky! Some cultures thought meteorites brought good fortune, but scientifically they are just amazing rocks from space.

Many meteorites contain iron-nickel metal. When they are cut and polished, the metal shines like silver.

Tiny ones hit the Moon all the time, and bigger ones occasionally. The chance of one hitting an astronaut is very small, but future Moon bases will need protection.

It is possible but very rare. A falling meteorite could hit a tree and break branches, but most fall to the ground. A few have been found tangled in branches or roots.

Not usually. Meteorites are mostly rock and metal. But their outer crust is glassy, and some natural glasses on Earth, called tektites, were made by meteorite impacts.

Usually tiny: most shooting stars are made by grains between the size of a grain of sand and a small pea.

Space dust starts glowing as soon as it hits enough air, about 80 to 120 kilometres up, and tiny grains burn away before getting any lower.

Scientists estimate that dozens to hundreds of meteorites heavier than about 10 grams land somewhere on Earth every day, mostly in the sea or in places where nobody sees them.

Space dust grains are so tiny and fall so slowly after slowing down high in the air that they land as gently as ordinary dust.

Special cameras point at the sky all night and record any moving streak of light. Computers spot the meteors and save the videos for scientists.

Planets are big, round and have cleared their paths around the Sun. Asteroids are much smaller, usually lumpy, and share their paths with many others.

Most scientists think the Moon formed after a planet about the size of Mars crashed into the young Earth, about 4.5 billion years ago, throwing out rock that gathered into the Moon.

It is possible but very unlikely. About 400 meteorites from Mars are known, mostly found in deserts and Antarctica by experienced hunters.

Gloves, lab coats and safety glasses, and for the most precious samples, full clean-room suits with hoods and masks to stop contamination.

Museums keep meteorites safe for scientists to study, now and in the future, and display them so everyone can see real pieces of space.

Ever since it formed, about 4.5 billion years ago. Impacts were much more common in Earth's early days and are rare today.

Bigger space rocks can break apart in the air. Each time they break, they suddenly get brighter, making a flash or flare.

A fireball is a shooting star brighter than the brightest planets. It may last a few seconds, change colour, flare or break into pieces.

It depends on how much dust a comet left in its trail and how close Earth passes to the thickest part. Fresh trails can make spectacular displays.

Record the date, time, place, sky conditions, how many meteors you saw, how bright they were, their colours and any fireballs.

Yes. Some comets dive straight into the Sun or are destroyed by its heat. Spacecraft watching the Sun have seen thousands of these sungrazing comets.

When a comet comes near the Sun, its ice turns to gas, releasing dust. Sunlight and the solar wind push the gas and dust away, making long tails.

Yes. Meteorites fall in any weather. Clouds and rain are far below where meteors glow, so a meteorite can fall during a storm, but nobody would see the fireball.

The word comes from Ancient Greek meaning 'high in the air'. Long ago, anything happening in the sky, even rain, was called a meteor.

They measure special atoms made by cosmic rays in space. These atoms slowly disappear once a meteorite lands, so measuring what is left shows how long ago it fell.

Some fireballs have been brighter than the Sun. The Chelyabinsk fireball in Russia in 2013 was, for a moment, about 30 times brighter than the Sun.

On 13 April 2029, asteroid Apophis, about 340 metres across, will pass about 32,000 kilometres above Earth, close enough to see without a telescope from some places. It will not hit us.

It could, but it would be very unlikely, and the meteorite would probably melt in the hot lava. Volcanoes and meteorites are both ways that rocks can be very hot.

People saw stones fall for thousands of years, but scientists only agreed that they came from space after a big fall of stones at L'Aigle in France in 1803.

A museum label tells you the meteorite's name, what kind it is, where and when it fell or was found, and why it is special.

Meteorites help explain where Earth, its water and even the ingredients of life came from, and studying them helps protect our planet.

Meteorites link naturally to rocks, Earth and space, forces, materials, the history of science and geography, from primary school to A-level.

Start with a story or an object, use simple words, and let pupils investigate: compare rocks, try a magnet, make craters and watch for shooting stars.

Yes, in many countries. National loan schemes, universities and museums lend sealed meteorite and lunar sample kits to schools, usually after a simple certification.

Crater-making in flour, density measurements, magnet tests, sorting rocks, modelling meteor showers and half-life simulations are all safe and effective.

Change one variable, such as drop height or ball mass, keep everything else the same, repeat each drop three times and measure crater diameter carefully.

Common ones are that shooting stars are stars, that meteorites are hot or radioactive, that most are huge, and that every heavy dark rock is from space.

Pupils measure the mass and volume of meteorites and ordinary rocks and calculate density, discovering that iron meteorites are about three times denser than common rocks.

Meteorites show rocks that never went through Earth's rock cycle, which makes them a powerful comparison: igneous, metamorphic and breccia types exist, but formed on asteroids.

Pick a major shower and a moonless date, choose a safe dark site, plan supervision and warm clothing, and give pupils a simple counting task.

Treat meteorites like ordinary rock specimens: risks are low and are managed with supervision, clean dry hands, handwashing, and no tasting, breaking or heating.

Yes, with care. Collecting dust from a roof gutter and searching it with a magnet and microscope is a real research technique, but genuine micrometeorites are rare and need expert confirmation.

Use sorting tasks and dichotomous keys based on observable features such as metal content, chondrules and crystals, then compare pupils' groups with the scientific classification.

Meteorites show elements and compounds in nature: iron-nickel alloys, silicates, sulfides and even organic molecules, and they link to the origin of the elements.

Meteorite falls appear in chronicles, church records and folklore, and the scientific debate about stones from the sky is a great case study in changing ideas.

Winchcombe is ideal: a 2021 UK fall recorded by cameras, found on a driveway, rapidly recovered and found to be a rare carbonaceous chondrite containing water.

Good projects include crater experiments, density studies, meteor counting, micrometeorite searches, rust prevention trials and modelling fireball triangulation.

Fireballs offer real data for speed, distance, angles, triangulation, scale and statistics, from simple calculations to trigonometry.

Give accurate facts calmly, emphasise how rare large impacts are and how scientists are watching, and focus on curiosity and problem-solving.

With binoculars or a small telescope, pupils can see many craters, best along the terminator, the line between light and dark, rather than at full Moon.

Pupils can count meteors and submit their counts, report fireballs, run radio meteor detectors, and join projects that search images or data.

In 1956 the American scientist Clair Patterson used lead in meteorites to calculate an age of about 4.55 billion years for Earth and the Solar System.

Use dice, coins or sweets: each round, remove the ones that 'decay' and plot how many remain. Pupils see the halving pattern and the randomness of decay.

Use the equation half m v squared with real meteoroid speeds to show why small space rocks carry enormous energy and why speed matters more than mass.

Meteorites illustrate igneous and metamorphic petrology, crystallisation, isotope geochemistry and planetary differentiation, and thin sections make excellent practical material.

Give groups a set of rocks, including slag, iron ore and basalt, and ask them to test each with simple, safe observations: magnet, weight, surface and streak.

Welcome their curiosity, look at it together using simple observations, record where it was found and, if it looks promising, suggest the family contact a museum.

Martian meteorites provide real evidence about Mars's volcanoes, water and atmosphere and show how scientists prove where a rock came from.

Meteorite science involves geologists, chemists, physicists, engineers, curators, data scientists and communicators, showing pupils a wide range of STEM careers.

Questions about ownership, selling, Antarctica, planetary defence and evidence for life spark debate and develop reasoning skills.

The slow acceptance that stones fall from the sky, between about 1794 and 1803, shows how evidence, testing and careful investigation change scientific opinion.

Pupils can write from a meteorite's point of view, create comic strips of a fall, paint Widmanstätten patterns or design museum labels.

Compare meteor speeds of 11 to 72 kilometres per second with cars, trains, aeroplanes, bullets and even the Space Station, using journeys pupils know.

Asteroids show how gravity shapes paths around the Sun, how resonances with Jupiter deliver meteorites, and how gravity assists and deflection work.

Plan a mix of practical activities, observing, guest talks, projects and trips over a term, keeping sessions hands-on and building towards a showcase.

Antarctic meteorite hunting links to ice sheets, glacier flow, extreme environments, international cooperation and the Antarctic Treaty.

Use quick quizzes, concept maps, explain-a-diagram tasks, practical write-ups and misconception checks to see what pupils know and can apply.

Get permission, stay with the group, avoid cliffs and tides, wear suitable clothing, use tools only under supervision and respect protected sites.

Use orbits calculated from filmed fireballs, which trace back to the asteroid belt, plus spacecraft samples from asteroids Itokawa, Ryugu and Bennu that match meteorites.

Meteorites record the sequence from dust and the first solids to planetesimals, melting and differentiation, so pupils can build a timeline from real objects.

Compare two airbursts a century apart, using maps, eyewitness accounts, energy estimates and damage patterns to discuss evidence and risk.

Offer the same core activity with different levels of support and challenge: word banks and picture cards for some, calculations and open investigations for others.

Use the idea of brief surface heating, poor heat conduction into rock, and a slow final fall through cold air; a toasted marshmallow analogy works well.

Some meteorites contain water-bearing minerals and water with hydrogen isotopes similar to Earth's oceans, so pupils can weigh the evidence that asteroids delivered water.

Apollo samples show how direct evidence transformed understanding of the Moon, from its age and origin to its craters, and they link to engineering and teamwork.

Chondrules are tiny once-molten droplets, older than Earth, that make up much of most meteorites; comparing them to frozen raindrops or sweets in a cake helps.

Teach them as three stages of one journey: in space, in the sky and on the ground. Actions, diagrams and simple memory tricks help pupils remember.

Yes. Low-cost meteor cameras using small computers and sensitive cameras can record meteors every clear night, and some can join fireball networks.

A six-lesson sequence might move from the journey of a meteorite, through types and identification, craters and energy, dating and origins, to a final investigation or debate.

Measuring the density of irregular solids by water displacement is a standard GCSE physics practical, and meteorite replicas or rock samples give it a real purpose.

Meteor colours come from glowing atoms such as sodium, magnesium and calcium, just as in flame tests, so a flame test practical explains why meteors glow in different colours.

Pupils can time fireballs frame by frame, estimate angular speed, note colour and fragmentation, and compare videos from different places to understand triangulation.

Compare headlines with scientific facts, check how probabilities are reported, and identify sensational language, using stories such as asteroid near-misses.

Use simple analogies such as an hourglass or a melting ice lolly: some atoms slowly change at a steady rate, so measuring how much has changed tells us how long ago the rock formed.

Set up a classic rusting investigation with iron nails in different conditions, then explain why iron meteorites rust on Earth and how museums prevent it.

Pupils test a collection of rocks with magnets, discover that most meteorites are attracted because they contain iron, and learn that some Earth rocks are magnetic too.

Use hand lenses or digital microscopes on meteorite slices and photographs of thin sections, so pupils can see chondrules, metal grains and crystals.

Create a sequence of puzzles based on meteorite science, such as decoding names, density calculations and identifying chondrules, leading to a final answer that unlocks a box.

Plan hands-on stations, a meteorite handling session, crater experiments, a fireball reporting display, a guest speaker and an evening sky watch.

Explain that most elements in our bodies were made in stars, and show that meteorites contain actual grains of stardust from stars older than the Sun.

Use high-quality photographs, replicas, everyday analogues, videos, virtual 3D models and hands-on models, and focus on evidence and reasoning.

Mix plaster or clay with small beads for chondrules and iron filings or steel shot for metal, shape them, and paint the outside black to model fusion crust.

Iron meteorites model Earth's metal core, pallasites the core-mantle region and stony meteorites the mantle and crust, helping pupils understand layers they can never visit.

Use cases where evidence was debated or changed, such as ALH 84001, asteroid impact probabilities and the origin of chondrules, to show how science handles uncertainty.

Meteors glow mainly because they compress the air in front of them so violently that it heats up, not because of rubbing friction.

Use the evidence chain, iridium layer, shocked quartz, spherules and the buried crater, to show how scientists linked an asteroid to the end-Cretaceous extinction.

Good tasks include a home meteor watch, interviewing family about fireballs, making a model, researching a famous meteorite, writing a news report or designing a museum label.

Store them dry in labelled boxes with silica gel, handle them over trays with clean hands, check for rust regularly and keep an inventory.

Show how spinning causes flattening, using a spinning pizza dough video or a rotating bowl, then model dust clumping into planetesimals with a tray of particles.

DART's impact on Dimorphos is a real example of momentum transfer: students can estimate the change in speed and see why ejected debris made the push stronger.

Asteroids glow in infrared because they are warmed by the Sun, so infrared telescopes can find dark asteroids and measure their sizes better than visible-light telescopes.

Send home sky-watching guides, invite families to evening observing events and science fairs, and set homework that encourages conversations about space.

Use them for starter definitions, research tasks, reading comprehension, quiz writing and homework, choosing entries by level from beginner to expert.

Run a strewn field hunt with replicas, make scale models of the Solar System across the playground, map a fireball path and test rocks found on the school grounds.

Present the giant impact hypothesis, show the evidence from Moon rocks and meteorites, and let pupils model the impact and evaluate competing ideas.

Any age. Children as young as four or five enjoy shooting stars and space rocks, and the topic can deepen all the way to university level.

Have pupils count stars and meteors from different sites, compare results, and investigate how lighting affects astronomy, wildlife and energy use.

Using a star map or planisphere, pupils locate the shower's radiant constellation, then trace meteor paths backwards to see which meteors belong to the shower.

Compare the types of meteorites among falls and finds to show how the way data are collected affects results, a key idea in statistics and science.

Help them choose a focused question, find reliable sources, plan methods, manage time and present findings clearly, with regular check-ins.

Present beliefs and stories accurately and respectfully, ideally in a community's own words, alongside science, without mocking or treating them as mistakes.

Pupils count craters in equal-sized areas on images of the Moon or Mars and compare regions, learning that more craters usually means an older surface.

Use a mystery object, a real fireball video, a news story, a surprising fact or a question such as 'What is the oldest thing you have ever touched?'

Match the beginner, explorer, enthusiast and expert levels to your pupils' ages and confidence, and use the lessons' quizzes for starters, homework or revision.

Hot and cold deserts are best: dry conditions preserve meteorites for thousands of years and dark stones stand out on pale ground. Antarctica's blue ice and the Sahara have produced most of the world's meteorites.

Start by learning what real meteorites look and feel like, ideally by handling museum or dealer specimens. Then research known fall areas, get permission to search, and use a magnet and a careful, systematic approach.

Antarctica's moving ice carries meteorites to certain blue-ice areas, where wind strips the surface away and leaves them stranded. Dark stones on white ice are easy to spot, and the cold, dry climate preserves them.

Deserts are dry, so meteorites rust very slowly and can survive for tens of thousands of years. Sparse vegetation and pale ground also make dark stones easy to spot.

It's possible but rare. Britain's wet climate makes meteorites rust away and its green landscape hides them, so almost all British meteorites were seen to fall. Searching after a well-tracked fireball gives the best chance.

Yes, for iron meteorites and most ordinary chondrites, which contain iron-nickel metal. It won't detect metal-poor types such as many achondrites and carbonaceous chondrites, and natural magnetic rocks cause false signals.

Yes. Always get permission from the landowner, and check national and local laws, because some countries treat meteorites as state property and many protected areas ban collecting altogether.

It's possible but very unlikely. Meteorites have occasionally landed in gardens, but most garden 'meteorites' turn out to be slag, clinker or ordinary rocks. Tiny micrometeorites are a more realistic target.

Micrometeorites are tiny particles of space dust, smaller than about 2 mm, that survive their fall to Earth. Thousands of tonnes land every year, and with patience and a microscope you can search for them.

They use the fireball's calculated path to target the likely area, get landowner permission, then walk slowly in organised lines, scanning the ground, often with magnets and metal detectors, and record every find precisely.

More than 85,000 meteorites were listed in the international catalogue by 2026, including some with provisional names. Only around 1,300 of them were seen to fall; the rest are finds.

Note exactly where you found it, photograph it, keep it clean and dry in a bag or foil, and don't wash, cut, heat or test it with chemicals. Then send clear photos to a museum or university geology department for an opinion.

It depends mainly on climate: in wet places a meteorite may rust away within decades to thousands of years, while in hot deserts many survive for tens of thousands of years and in Antarctic ice some last more than a million.

Hunters rely on sharp eyes, a strong magnet, a metal detector, GPS, clean bags or foil, a camera and a notebook, and increasingly on fireball data and drones. Just as essential are permission from the landowner and knowledge of local laws.

Yes, thousands every year. The Meteoritical Society approved about 3,600 new meteorites in 2024 and nearly 2,000 in 2025, and each year's list typically includes a dozen or more witnessed falls.

Usually a dark, rounded stone that looks out of place, often with a black or brown crust, heavier than nearby rocks and with no sharp layers or bubbles.

In farmland, after ploughing and before crops grow; in deserts, during cooler months; in snow, after fresh falls. Low sunlight and dry weather help.

Rarely. Meteorites do land near coasts, but they rust quickly in salty water and are hard to tell from the many dark pebbles and slag on beaches.

Get permission, walk slowly in straight lines a few metres apart, scan for dark or out-of-place stones, use a magnet stick, and record anything promising.

Yes. Drones with cameras can photograph large areas, and computer programs trained to spot meteorites can flag candidates for searchers to check.

Scientists use camera data, eyewitness reports and wind models to calculate a predicted fall area, which they often share with searchers and the public.

Most small meteorites land at a few hundred kilometres per hour and make only a shallow pit. Larger or iron ones can penetrate deeper, especially in soft ground.

Yes. Dark meteorites stand out clearly against white snow, so fresh falls onto snow-covered ground are sometimes found quickly.

Desert hunting means long walks or drives across stony plains in heat, scanning for dark stones, with careful planning for water, navigation and local laws.

Often yes, because most stony meteorites contain iron-nickel metal grains, but signals are weak and depend on the detector, the stone and the ground.

Rarely. Meteorites in water rust quickly and get mixed with river pebbles, but iron meteorites have occasionally been found in stream beds.

No. Meteorites fall roughly evenly over the whole Earth. They are found more in some places only because those places preserve and reveal them better.

A strong magnet on a stick, a GPS or phone, a camera, clean foil or bags, labels and pen, water, sun or weather protection, and the landowner's permission.

Look for a thin dark fusion crust, unusual weight for the size, attraction to a magnet and, on a broken face, metal flecks or small round grains. No home test is conclusive, so an expert must confirm it.

No: most meteorites contain iron-nickel metal and will attract a magnet, but many achondrites, including most Martian, lunar and Vesta meteorites, react only weakly or not at all. Plenty of magnetic Earth rocks are not meteorites.

Usually, yes: most stony meteorites are denser than common rocks because they contain iron-nickel metal, and iron meteorites are more than twice as heavy as an ordinary stone of the same size. Some carbon-rich meteorites, though, are surprisingly light.

It depends on the type: most stony meteorites are grey inside with metal flecks and tiny round grains, iron meteorites are solid metal that shows a crisscross pattern when etched, and pallasites hold olivine crystals in metal.

A meteorwrong is a rock or object that looks like a meteorite but isn't. Common examples include industrial slag, iron ores such as magnetite and hematite, dark volcanic rock, flint and rusty bits of manufactured iron.

Almost certainly not, because round holes and bubbles usually mean volcanic rock or industrial slag, formed as gas escaped from molten material. Meteorites are normally solid, with only shallow dents on the surface.

Yes, very often. Slag, the glassy waste from smelting metal, can be dark, heavy, magnetic and rusty, but it is usually full of gas bubbles, glassy in places, and lacks the fusion crust and inner structure of a real meteorite.

The streak test means rubbing a rock across an unglazed white ceramic tile to see the colour of its powder. Most meteorites leave little or only a faint grey streak, so a strong red-brown or black streak points to Earth minerals such as hematite or magnetite.

Specialists use chemical spot tests that turn pink in the presence of nickel, or instruments such as X-ray fluorescence. A home test needs a cleanly ground metal surface and chemicals, so it is best left to experts.

Natural history museums, university geology or planetary science departments and national geological surveys are the best places to ask. Start by emailing clear photographs with a scale, the weight and where you found it.

Fusion crust is the thin glassy skin that forms when a meteorite's surface melts during its fiery fall. On a fresh stony meteorite it is usually black, matt and less than about a millimetre thick, over a paler interior.

Regmaglypts are smooth, shallow, thumbprint-like hollows on the surface of many meteorites. They are carved during atmospheric flight, as hot gas melts and sweeps away the softer or more exposed parts of the surface.

Usually not, because most meteorites have a dull, matt black crust, while shiny black rocks are more often obsidian, slag, hematite, magnetite or desert-varnished stones. A few meteorites, such as eucrites, do have glossy crusts.

Large meteorites are almost never true spheres; they are usually irregular blocks with rounded edges, or cone shapes. Round balls are usually concretions, slag or ironstone, though microscopic space dust can form perfect spheres.

A qualified scientist studies a slice under the microscope, analyses its mineral chemistry and sometimes its isotopes, then submits the results to the Meteoritical Society's Nomenclature Committee. Once approved, the meteorite gets an official name and a classification published in the Meteoritical Bulletin.

Many Earth rocks and man-made materials are magnetic, including magnetite, some haematite, slag and iron objects. A magnet test is only a first clue.

Almost never in visible amounts. Quartz is common in Earth's crust but rare in meteorites, so a rock with obvious quartz crystals is very likely terrestrial.

Generally no. Meteorites lack the bedding layers found in sedimentary rocks, although some show veins, flow lines on their crust or patterns inside.

A meteorite is a piece of a space rock. A tektite is natural glass made from Earth rock melted and flung out by a large meteorite impact.

No. Moldavite is green natural glass formed from Earth rock melted by an impact in southern Germany about 14.8 million years ago.

Inside, an iron meteorite is solid, silvery metal. When cut, polished and etched, many show a criss-cross Widmanstätten pattern or fine Neumann lines.

Some scans help. X-ray fluorescence can detect nickel, and CT scans show metal grains inside, but full confirmation needs lab analysis of a sample.

No. Concretions are rounded lumps formed in sediments on Earth, often iron-rich and heavy, which makes them common meteorwrongs.

Probably not. Most iron lumps found in gardens are man-made scrap, slag or iron ore. Meteoritic iron contains nickel and shows a crystal pattern when etched.

Only after seeking expert advice. Grinding a small window can reveal metal flecks and chondrules, but it permanently alters the specimen.

Most do not. Bubbles and holes usually indicate slag or volcanic rock, though a few rare meteorites contain vesicles or holes where troilite has weathered out.

No. Libyan Desert Glass is natural silica glass found in western Egypt, formed about 29 million years ago, probably by the heat of an impact or airburst.

A weathered meteorite is brown or rusty, with patchy or missing crust, rust stains inside and sometimes cracks, and it may look like an ordinary brown rock.

Slag is usually bubbly, glassy or swirled, often lighter than expected and may have flow textures; meteorites are dense, have a thin crust and no bubbles inside.

An oriented meteorite kept the same face forwards as it fell, giving it a smooth cone or shield shape, flow lines radiating from the front and sometimes a rollover lip.

Not usually. Meteorites land on the surface, so they are not found inside Earth rocks, except for rare fossil meteorites preserved in ancient sedimentary rock.

Meteorites land somewhere on Earth every day, but most drop into the sea or onto empty land and are never seen. Only a handful of falls each year are both witnessed and recovered.

Estimates vary, but thousands of tonnes of extraterrestrial material reach Earth every year, almost all of it as tiny dust grains rather than rocks you could hold.

Meteoroids hit the top of the atmosphere at between about 11 and 72 km/s. Air resistance then slows survivors to a free fall of typically a few hundred kilometres per hour before they land.

Usually not. The outer skin melts for only a few seconds high in the atmosphere, and the cold interior means most fresh meteorites are cool, warm at most, when they reach the ground.

The black skin is fusion crust: the meteorite's surface melted during its fiery plunge through the atmosphere and then froze into a thin glassy coating.

A fireball is an exceptionally bright meteor, usually defined as brighter than the planet Venus. It is caused by a larger-than-usual piece of space rock entering the atmosphere.

On 15 February 2013 a stony asteroid about 18–20 metres across exploded high above Chelyabinsk in Russia. The shock wave shattered windows across the region and injured around 1,500 people, mostly from flying glass.

On 30 June 1908 a large space rock exploded in the air over a remote part of Siberia, flattening around 80 million trees across more than 2,000 square kilometres without leaving a crater.

A strewn field is the area over which pieces of a single meteorite fall are scattered, usually an oval shape several kilometres long, with the smallest stones at one end and the largest at the other.

Note the time, where in the sky it started and ended, how long it lasted and anything you heard, then report it quickly to a fireball or meteor network. Many reports together let scientists work out its path.

Not usually in advance, but after a fireball is filmed from several places, scientists can calculate its path and predict a search area. In a few rare cases, small asteroids have been spotted in space hours before they hit.

Networks of automatic all-sky cameras film the night sky. When two or more catch the same fireball, software triangulates its path, works out its orbit, and predicts where any meteorites fell.

Yes. Britain has a couple of dozen recorded falls, including Wold Cottage in Yorkshire in 1795, Barwell in Leicestershire in 1965, Glatton in Cambridgeshire in 1991 and Winchcombe in Gloucestershire in 2021.

Winchcombe is a rare carbonaceous chondrite that fell in Gloucestershire, England, on 28 February 2021. Recovered within hours and barely touched by Earth's environment, it is one of the most pristine meteorites ever studied.

Most meteoroids are tiny, and they hit the air so fast that it is compressed and heated in front of them, melting and vaporising their surfaces. Small grains are destroyed completely within seconds.

Most don't. Ordinary meteorites are slowed to free-fall speed by the air and make only a small pit. Only rare large objects, roughly tens of metres across or more, keep enough speed to blast out a true crater.

Big fireballs can produce delayed sonic booms and rumbles like thunder, and falling stones may whistle or buzz in their final moments. A few people also report hissing heard at the same moment as the flash.

Yes. Since 2008 about a dozen small asteroids have been discovered hours before striking Earth, and meteorites were recovered from a few of them.

Dark flight is the final stage of a meteorite's fall, after it has slowed so much that it stops glowing. It then drops unseen for several minutes, pushed around by the wind.

As a meteoroid plunges into thicker air, the pressure on its front builds rapidly. If that pressure exceeds the rock's strength, often weakened by old cracks, it shatters and the pieces fall as a meteorite shower.

More recorded meteorite falls happen in the afternoon and evening than in the morning, partly because of the geometry of Earth's orbit and partly because more people are awake to see them.

Typically, a stony meteoroid needs to be at least about the size of a grapefruit to a football, with a few kilograms of mass, to leave pieces on the ground. Slow, strong ones survive best.

The air around a fireball heats to several thousand degrees, forming glowing plasma, but the meteoroid itself only melts at its surface for a few seconds.

Objects about 20 metres across, like the Chelyabinsk meteoroid, are thought to strike Earth roughly once every few decades to a century, mostly over oceans or remote areas.

Meteor showers do not drop meteorites. Their particles are tiny, fragile comet dust travelling too fast to survive. Any meteorite during a shower is coincidence.

When a large meteoroid breaks apart in the atmosphere, it can shower thousands of fragments over a strewn field, as at Pultusk in 1868 and Holbrook in 1912.

Sikhote-Alin in Russia in 1947 delivered the most mass of any witnessed fall, an estimated 70 tonnes or more of iron. Jilin in China in 1976 produced the largest stony meteorite fall.

Yes. Military, weather and research satellites detect bright fireballs from orbit, and their data have helped locate where meteorites fell.

Objects about 40 to 60 metres across, like the one that caused the Tunguska event of 1908, are thought to strike Earth roughly once every few hundred to a thousand years.

Sutter's Mill is a rare carbonaceous chondrite that fell in California on 22 April 2012, recovered partly thanks to weather radar, near the site of the 1848 gold discovery.

Tagish Lake is a fragile, carbon-rich meteorite that fell on a frozen lake in Canada on 18 January 2000 and was collected frozen, preserving unusual organic material.

On 15 September 2007, a stony meteorite struck the ground near Carancas in Peru, making a crater about 14 metres wide, a rare case of a stony meteorite creating a crater.

Glatton is a stony meteorite that fell into a garden in Cambridgeshire, England, on 5 May 1991, the last British fall recovered before Winchcombe in 2021.

Ribbeck is a rare aubrite meteorite from asteroid 2024 BX1, which was discovered hours before it burned up over Germany on 21 January 2024.

A meteorite is a natural piece of rock or metal from space that has survived the fiery trip through Earth's atmosphere and landed on the ground. Almost all come from asteroids, with a small number from the Moon and Mars.

A meteoroid is a small body travelling through space; a meteor is the streak of light it makes when it burns through the atmosphere; and a meteorite is any piece that survives to reach the ground.

Most meteorites are fragments of asteroids, chipped off in collisions in the asteroid belt between Mars and Jupiter. A small number come from the Moon and from Mars.

Meteorites are made of the same chemical elements as Earth, mostly as silicate minerals such as olivine and pyroxene, iron-nickel metal and iron sulfide. Some also contain clay minerals, water and carbon compounds.

There are three broad types: stony meteorites, iron meteorites and stony-iron meteorites. Stony meteorites are further divided into chondrites, which never melted, and achondrites, which did.

A chondrite is a stony meteorite that was never melted after it formed, so it preserves the original mixture of dust and grains from the early Solar System. Most contain chondrules, small round grains that give the group its name.

A chondrule is a small, rounded grain, usually less than a few millimetres across, that formed as a molten droplet floating in space in the early Solar System and then cooled quickly. Chondrules are the defining feature of chondrite meteorites.

An iron meteorite is made mainly of iron-nickel metal. Most are thought to be pieces of the metallic cores of asteroids that melted and separated into layers early in Solar System history.

A stony-iron meteorite is made of roughly equal amounts of iron-nickel metal and silicate rock. The two main kinds are pallasites and mesosiderites.

A pallasite is a stony-iron meteorite made of olivine crystals set in iron-nickel metal. Thin polished slices can glow like stained glass when light shines through the crystals.

A howardite is a type of achondrite meteorite made of broken fragments of two kinds of rock, eucrite and diogenite, fused together. Howardites are thought to be pieces of the surface rubble of the asteroid Vesta.

HED meteorites are the howardites, eucrites and diogenites, a family of igneous achondrites. Their light-reflecting properties, chemistry and orbits match the asteroid Vesta, and the Dawn spacecraft confirmed a close match when it visited.

A carbonaceous chondrite is a primitive stony meteorite rich in carbon compounds and often in water-bearing minerals. These meteorites are some of the least altered samples of the material that built the planets.

Yes, many do. Most of it is not liquid but locked inside minerals that formed in water, and carbonaceous chondrites can hold over a tenth of their weight in this bound water.

Some do. Carbonaceous chondrites contain amino acids, the components of DNA and RNA called nucleobases, and even sugars, all made by natural chemistry in space. They contain no life, but they show that life's ingredients formed widely.

Most meteorites formed about 4.56 billion years ago, at the birth of the Solar System, making them older than any rock on Earth. Some, such as many Martian meteorites, are much younger.

Scientists measure the products of natural radioactive decay in a meteorite's minerals, using several 'clocks' such as uranium-lead and rubidium-strontium. Other methods measure how long it travelled in space and how long it has been on Earth.

The oldest things are tiny grains of stardust that formed around other stars before the Sun existed. The oldest material that formed within our own Solar System is calcium-aluminium-rich inclusions, dated to about 4.567 billion years.

Meteorites act as a time capsule, recording when the first solids formed, how quickly asteroids and planets grew and melted, which stars contributed material, and how water and carbon compounds were spread around.

The Widmanstätten pattern is the criss-cross arrangement of metal bands seen when many iron meteorites are cut, polished and etched. It forms from two iron-nickel alloys that separated as the metal cooled extremely slowly.

The patterns grew as molten metal in the cores of asteroids cooled extremely slowly over millions of years, giving nickel atoms time to move and separate the metal into two different alloys. That slow cooling cannot be recreated in the laboratory.

A meteorite's classification is a short code that tells scientists what kind of rock it is, which group it belongs to and, for many stones, how strongly it was heated, altered, shocked or weathered.

The letter is the chemical group of an ordinary chondrite (H, L or LL, reflecting its iron and metal content), and the number is the petrologic type, showing how strongly the rock was heated or altered by water on its parent asteroid.

A breccia meteorite is made of broken fragments of rock cemented back together, usually by impacts on its parent body. Many meteorites, including howardites and most lunar meteorites, are breccias.

Achondrites are stony meteorites that formed from melted rock, so they lack the chondrules found in chondrites. They come from asteroids, the Moon and Mars that were hot enough to melt and separate into layers.

Most meteorites are chondrites because unmelted, chondritic asteroids are abundant in the parts of the asteroid belt that feed material to Earth, and recent studies trace many falls to a few young asteroid families. Differentiated bodies, whose cores and crusts produce irons and achondrites, supply much less.

Yes, but they are tiny. Meteorites contain nanodiamonds from ancient stars, diamonds in carbon-rich ureilites, and diamonds formed by the shock of impacts, none of them large enough to be gemstones.

Yes. Primitive meteorites contain tiny presolar grains that formed around other stars before the Sun existed. Scientists recognise them by their unusual isotope ratios.

Usually we only know the likely type or region of asteroid, by matching how meteorites and asteroids reflect light, reconstructing fireball orbits and comparing with samples returned by spacecraft. Only a few meteorite groups have been linked to a specific named body.

A cosmic-ray exposure age is the length of time a meteorite spent as a small body in space, exposed to cosmic rays, between breaking off its parent body and landing on Earth. It is measured from the rare isotopes those cosmic rays create.

Many meteorite types are known from only a handful of specimens, such as some achondrite and carbonaceous groups. Among well-known kinds, Martian, lunar and angrite meteorites are rare.

A ureilite is an unusual achondrite made of olivine and pyroxene with carbon, including graphite and tiny diamonds, from a parent body shattered early in its history.

Angrites are rare volcanic meteorites, among the oldest igneous rocks known, crystallising within a few million years of the Solar System's birth. They are used as precise time markers.

An aubrite is a pale achondrite made almost entirely of iron-free enstatite pyroxene, formed in extremely oxygen-poor conditions.

A mesosiderite is a stony-iron meteorite made of roughly equal parts metal and broken basaltic rock, a mixture thought to result from a violent collision.

CI chondrites formed from material that never melted or lost most of its elements, so apart from gases, their chemistry closely matches the Sun's atmosphere.

A CAI is a pale inclusion in some chondrites made of high-temperature minerals. CAIs are the oldest solids formed in the Solar System, about 4,567 million years ago.

Aqueous alteration is the change of minerals by liquid water inside asteroids, which turned olivine, pyroxene and metal into clays, carbonates and other water-bearing minerals.

It varied. Some asteroids stayed cool enough for ice to melt but not rock, while others reached 1,000 °C or more and melted completely into metal cores and rocky crusts.

Yes, some did. Studies of meteorites suggest that several early asteroids had molten metal cores that produced magnetic fields, like a small version of Earth's.

Scientists examine minerals under a polarising microscope, looking for features such as fractures, mosaic patterns, glass and high-pressure minerals, and assign a shock stage from S1 to S6.

A weathering grade, from W0 to W6, describes how much a meteorite has rusted and changed since landing on Earth, from fresh to almost completely altered.

Mainly by oxygen isotopes, which act like a fingerprint, together with chemistry, mineralogy and other isotope systems that group meteorites from the same source.

Probably more than a hundred. Meteorite groups and ungrouped meteorites suggest dozens of iron meteorite parent bodies alone, plus many more for stony meteorites.

Iron meteorites come from the cores of many small planetesimals that melted early; their strength lets them survive while the rocky outer layers were destroyed.

Yes. Iron meteorites are samples of planetary cores, and chondrites show the raw materials Earth was built from, helping scientists estimate the composition of Earth's interior.

They cut meteorites with diamond saws, prepare polished slices and thin sections, and analyse them with microscopes, electron beams and mass spectrometers, often using only tiny amounts.

A regolith breccia is a rock made from the compacted surface soil of an asteroid, the Moon or another airless body, preserving a record of its surface environment.

Grains that once lay on the surface of an airless asteroid were bombarded by the solar wind, which implanted solar gases into their outer layers.

They are radioactive isotopes with half-lives of millions of years or less that existed in the early Solar System. They provide precise clocks and heated early asteroids.

Asteroid-sized bodies formed within about the first few million years, Mars largely within about 10 million years, and Earth over roughly 30 to 100 million years.

It is the division of meteorites into two isotopic families, from the inner and outer Solar System, which stayed separate for millions of years, perhaps because of Jupiter.

Yes. Jupiter's gravity shaped the asteroid belt, scattered outer Solar System material inwards, and today steers asteroid fragments onto Earth-crossing orbits.

Lunar meteorites and comparisons with other meteorites show the Moon is chemically very similar to Earth, supporting a giant impact origin, while meteorites provide reference points.

Rocks blasted off Venus are blocked by its thick atmosphere and strong gravity, and rocks from Mercury tend to fall towards the Sun, so few, if any, reach Earth.

Ordinary chondrites, especially L and H types, make up about four out of five witnessed falls.

Yes. Some carbonaceous meteorites contain sugars, including ribose, and nucleobases used in DNA and RNA, though not DNA itself.

By collecting fresh falls quickly with clean tools, storing samples in dry nitrogen or vacuum, using clean rooms, and checking isotopes to tell space chemistry from Earth contamination.

Falls are fresh, unweathered and unbiased by searching, often with known orbits, so they give the clearest view of what reaches Earth and of delicate space chemistry.

Water and air rust its metal, alter its minerals and fill its cracks with Earth minerals. Over thousands of years, it crumbles and eventually disappears.

Yes. Tiny micrometeorites preserved in 2.7-billion-year-old rocks were oxidised as they fell, suggesting the upper atmosphere then contained more oxygen than expected.

Cosmic spherules are tiny melted droplets of space dust, usually less than a millimetre across, that solidified as they fell through Earth's atmosphere.

Interplanetary dust particles are tiny grains collected in Earth's stratosphere by high-flying aircraft; many come from comets and are among the most primitive materials known.

Increasingly, yes. Recent studies link many L chondrites to the Massalia asteroid family and many H chondrites to young families in the Koronis region.

Iron meteorites are divided into chemical groups, such as IAB, IIAB, IIIAB and IVA, according to their nickel, gallium, germanium and iridium content.

Most Martian meteorites crystallised between about 150 million and 1.4 billion years ago, but a few are much older, up to about 4.4 billion years.

Most lunar meteorites are breccias of pale highland rock rich in feldspar, while others are dark basalts from the maria or mixtures of both.

They are porous and full of soft clay minerals and organic matter, so they crumble easily, break up in the atmosphere and weather quickly on Earth.

Yes. Hundreds of minerals were first discovered in meteorites, and some, such as oldhamite and schreibersite, are extremely rare or unknown in Earth's crust.

Yes. Isotopes in meteorites suggest the Sun formed in a cluster of stars, possibly near massive stars that added short-lived radioactive elements.

Chondrites mix high-temperature chondrules and CAIs with low-temperature dust and organics, showing that materials from different places in the disc were stirred together.

The matrix is the fine-grained material that fills the spaces between chondrules and other components in a chondrite, like the mortar between bricks.

Solar wind gases, solar flare tracks and isotopes made by solar radiation in meteorites record that the young Sun was far more active than today.

A pallasite is a stony-iron meteorite of olivine crystals in iron-nickel metal. Most likely formed where core metal and mantle olivine mixed, perhaps after an impact.

Diamonds in meteorites form by shock during impacts, by high pressure inside large parent bodies, or as nanodiamonds from gas, some formed before the Sun.

Most stony meteorites travelled as small bodies for about 1 to 100 million years; iron meteorites typically for hundreds of millions of years.

A CM chondrite is a carbonaceous chondrite altered by water, rich in clay minerals and organic compounds, such as Murchison and Winchcombe.

A CV chondrite is a carbonaceous chondrite with large chondrules and abundant CAIs, such as Allende, the source of many key discoveries about the early Solar System.

Primitive achondrites are meteorites that were heated enough to partly melt but kept much of their original chondritic chemistry, such as acapulcoites and lodranites.

Kaidun is an extraordinary meteorite that fell in Yemen in 1980, containing a mixture of many different meteorite types in one stone.

An enstatite chondrite is a chondrite made mostly of iron-free enstatite pyroxene, formed in very oxygen-poor conditions, with isotopes similar to Earth's.

An R chondrite, or Rumuruti chondrite, is a rare, highly oxidised chondrite with abundant iron-rich olivine and almost no metal.

A nakhlite is a Martian meteorite made mainly of augite crystals that formed in a lava flow or shallow intrusion about 1.3 to 1.4 billion years ago.

A chassignite is a rare Martian meteorite made mostly of olivine, formed as crystals accumulated in a magma about 1.3 to 1.4 billion years ago.

They look for evidence that only an impact can produce, such as shatter cones, shocked quartz, high-pressure minerals, impact melt and meteorite fragments or chemical traces.

A shatter cone is a cone-shaped fracture in rock with radiating grooves, formed by the shock wave of a meteorite impact.

A brachinite is a rare olivine-rich achondrite, thought to be the residue left after an early asteroid partly melted and lost its basaltic melt.

An asteroid is a small, rocky or metallic body orbiting the Sun, left over from the formation of the planets. Most are found in the asteroid belt between Mars and Jupiter.

Asteroids are mostly rock and metal and stay inert, while comets contain a lot of ice and develop a glowing head and tails when they come close to the Sun. Comets also generally formed farther from the Sun.

Possibly, in rare cases, but no meteorite has been proven to come from a comet. Comet dust is fragile and fast, so it usually burns up as meteors, although some tiny dust particles collected in the stratosphere and in Antarctic snow are probably cometary.

A large asteroid impact on Mars can blast surface rocks fast enough to escape the planet's gravity, about 5 kilometres per second. Those fragments then orbit the Sun, sometimes for millions of years, until a few happen to cross Earth's path.

Gas trapped in glass inside some Martian meteorites matches the unusual atmosphere measured on Mars by the Viking landers in 1976. Their young ages, chemistry and oxygen isotopes also set them apart from all other meteorites.

Lunar meteorites match the rocks and soils brought back by the Apollo and Luna missions in their minerals, chemistry and oxygen isotopes. The first was recognised in 1982 from a stone found in Antarctica, ALH 81005.

In 1996 a NASA-led team suggested ALH 84001 held possible signs of ancient Martian microbes. Most scientists now think non-biological processes can explain all the features, but the meteorite did reveal that early Mars had liquid water.

The asteroid belt is a broad region between the orbits of Mars and Jupiter where most known asteroids orbit the Sun. Despite its fame, it is mostly empty space and contains surprisingly little mass.

A near-Earth asteroid is one whose orbit brings it within about 1.3 times Earth's distance from the Sun, so it can pass relatively close to our planet. More than 40,000 are now known.

A meteor shower is a period when many more meteors than usual are seen, all appearing to fly out from the same point in the sky, because Earth is passing through a stream of debris left by a comet or asteroid.

For most showers the best time is after midnight and before dawn, when your side of Earth faces forward along its orbit. Pick a moonless night near the peak of a major shower such as the Perseids or Geminids.

Meteor showers happen when Earth passes through a trail of dust and small particles shed by a comet, or occasionally an asteroid, along its orbit. The particles hit the atmosphere at high speed and burn up as meteors.

Somewhere dark, away from street lights, with a wide open view of the sky. Moorland, rural fields, the coast and designated dark sky places are ideal, but even a dark garden can work.

No. Meteors move fast and can appear anywhere in the sky, so your eyes are the best instrument. A telescope or binoculars would show only a tiny patch of sky.

They are pristine samples of two carbon-rich asteroids brought to Earth by spacecraft: about 5.4 grams from Ryugu by Japan's Hayabusa2 in 2020, and about 121.6 grams from Bennu by NASA's OSIRIS-REx in 2023.

Yes. Meteorites have been found on Mars by rovers, and impacts are seen on many planets and moons. Whether a fragment survives depends on the planet's atmosphere and the impact speed.

Not as far as anyone has confirmed. Three interstellar objects have been seen passing through the Solar System, including 'Oumuamua in 2017, but no meteorite has been proven to come from another star system, and claims of an interstellar meteor remain disputed.

A planetesimal is one of the small solid bodies, from about a kilometre to hundreds of kilometres across, that formed in the young Sun's disc of gas and dust and were the building blocks of planets.

Vesta is the second-largest body in the asteroid belt, about 525 kilometres across. It is a layered world with a crust, mantle and iron core, and it is the source of the HED meteorites, including howardites.

Space weathering is the slow change of airless surfaces, such as the Moon and asteroids, caused by solar wind, cosmic rays and micrometeorite impacts. It typically darkens and reddens their surfaces.

Asteroids look different colours because they are made of different materials and have different histories. Carbon-rich asteroids are dark, rocky ones reflect more light with reddish tints, and space weathering and fresh surfaces alter the colours further.

Apophis is an asteroid about 340 metres across that will pass very close to Earth on 13 April 2029. Scientists have ruled out an impact for at least the next century.

Asteroid 2024 YR4, about 60 metres across, briefly had a chance of hitting Earth in 2032 of up to about 3 per cent, before further observations ruled it out.

Yes. The Moon is struck constantly by meteoroids, and telescopes on Earth see impact flashes, while orbiting spacecraft have photographed new craters.

Possibly. Asteroids contain water, metals and other resources, and companies and space agencies have studied mining them, but no asteroid has yet been mined.

They range from metres to nearly 1,000 kilometres across. Ceres, the largest, is about 940 kilometres wide; most known asteroids are a few kilometres or smaller.

Ceres is the largest object in the asteroid belt, a dwarf planet about 940 kilometres across, with a crust of rock, ice and salts and bright patches of sodium carbonate.

Comets can hit Earth, and a large one would be very dangerous, but such impacts are extremely rare. Comets are also harder to warn about than asteroids because many arrive unexpectedly.

The Oort Cloud is a vast, distant shell of icy bodies thought to surround the Solar System, the source of long-period comets.

The Kuiper Belt is a region beyond Neptune, about 30 to 50 times Earth's distance from the Sun, containing icy bodies such as Pluto and Arrokoth.

Yes. Many asteroids have moons. The first was Dactyl, found orbiting Ida in 1993, and DART's target Dimorphos is the moon of Didymos.

It is possible in principle, because rocks have travelled from Mars to Earth, but there is no evidence that life ever made the journey.

Sunlight warms asteroids, and the heat they radiate gives a tiny push, called the Yarkovsky effect, that slowly changes their orbits over millions of years.

The Torino scale rates the hazard of an asteroid or comet impact from 0, no hazard, to 10, certain global catastrophe, to help communicate risk to the public.

No single person: the German physicist Ernst Chladni argued in 1794 that they came from space, chemist Edward Howard showed in 1802 that they share a distinctive chemistry, and Jean-Baptiste Biot's 1803 investigation of the L'Aigle fall convinced the scientific world.

The oldest witnessed fall with a surviving specimen is generally accepted to be the Nōgata meteorite, which fell in Japan on 19 May 861 CE and is still kept at a Shinto shrine; older written records of falls exist, but without preserved stones.

The Ensisheim meteorite is a stone of about 127 kg that fell into a wheat field near Ensisheim in Alsace in November 1492, making it the oldest European witnessed fall whose meteorite survives; about 55 kg of it remains in the town.

The fall of thousands of stones near L'Aigle in Normandy on 26 April 1803 was investigated by the physicist Jean-Baptiste Biot, whose careful report finally convinced the scientific establishment that rocks really do fall from the sky.

The Wold Cottage meteorite is a stone of about 25 kg that fell near Wold Newton in Yorkshire on 13 December 1795; it is the largest single meteorite seen to fall in Britain and helped persuade scientists that stones fall from the sky.

Yes. Before people learned to smelt iron from ore, meteorites were the main source of iron metal, used for beads, blades and tools in ancient Egypt, Bronze Age Europe, the Arctic and elsewhere.

It is an iron-bladed dagger found wrapped with the mummy of the Egyptian king Tutankhamun; a 2016 study showed that its blade is made of meteoritic iron, rich in nickel and cobalt.

The largest known meteorite is the Hoba iron in Namibia, estimated at about 60 tonnes; it was found in 1920 and still lies where it landed.

The largest single stone seen to fall in Britain is Wold Cottage (Yorkshire, 1795) at about 25 kg, while the largest total mass from one fall is Barwell (Leicestershire, 1965), about 44 kg spread across many fragments.

Most scientists agree that the main cause was an asteroid about 10 km across that struck Mexico's Yucatán Peninsula 66 million years ago, creating the Chicxulub crater; massive volcanic eruptions in India may also have played a part.

Meteor Crater, also called Barringer Crater, is a bowl about 1.2 km wide and 170 m deep in the Arizona desert, blasted out around 50,000 years ago by an iron asteroid perhaps 50 m across.

The biggest confirmed impact structure is Vredefort in South Africa, formed about 2 billion years ago, with an original diameter estimated at roughly 250–300 km, though erosion has removed the original crater rim.

Almost all of the Moon's craters were made by asteroids and comets hitting it; with no air, no weather and almost no geological activity today, the scars have survived for billions of years.

Peekskill is a stony meteorite of about 12.6 kg that fell on 9 October 1992 after a fireball filmed by many people across the eastern United States, and it struck the boot of a parked car in Peekskill, New York.

Ann Hodges was an Alabama woman who, on 30 November 1954, was hit on the hip by a meteorite of about 4 kg that crashed through her roof; she is the first person known for certain to have been injured by a meteorite.

On 30 January 1868, a meteoroid exploded over Pułtusk in Poland, scattering an estimated tens of thousands of stones, one of the largest showers of meteorites known.

On 19 July 1912, an estimated 14,000 or more stones fell near Holbrook, Arizona, in one of the largest meteorite showers in North America.

Many Indigenous peoples valued meteorites: the Inuit made tools from Cape York iron, and peoples in North America and elsewhere treated meteorites as sacred objects.

Harvey Nininger was an American collector and researcher who, from the 1920s to the 1960s, did more than anyone to establish meteoritics as a science in the United States.

In the early 1980s. Gas trapped in the Antarctic meteorite EETA79001 matched the Martian atmosphere measured by the Viking landers, confirming a Martian origin.

In 1982, a small meteorite found in Antarctica, ALH A81005, was recognised in 1983 as coming from the Moon, the first meteorite proven to be lunar.

Murchison is a carbonaceous chondrite that fell in Victoria, Australia, on 28 September 1969. It is famous for containing amino acids and many other organic molecules.

Allende is a large carbonaceous chondrite that fell in Mexico on 8 February 1969, providing tonnes of material rich in CAIs, the oldest solids in the Solar System.

In 1969 the Allende and Murchison meteorites fell, Japanese scientists found the first concentration of meteorites in Antarctica, and Apollo 11 brought back Moon rocks.

The first was found in 1912 by an Australian expedition, but the discovery that the ice concentrates meteorites came in 1969 when Japanese scientists found nine near the Yamato Mountains.

Chinese records describe meteors, meteor showers, fireballs and falling stones over more than two thousand years, among the longest continuous records in the world.

Cape York is a group of large iron meteorites found in north-western Greenland, used by the Inuit for tools for centuries; its largest piece, Ahnighito, weighs about 31 tonnes.

The Kaali crater on the Estonian island of Saaremaa was formed by an iron meteorite impact a few thousand years ago and may be linked to local legends and ancient rituals.

Ernst Chladni was a German physicist who, in 1794, argued that meteorites and fireballs come from space, an idea that many scientists then rejected.

Edward Howard was an English chemist who, in 1802, showed that stones from different falls were similar to each other and contained nickel, unlike Earth rocks.

Ensisheim fell in Alsace in 1492, was hung in the town church as a sign of wonder, was taken away during the French Revolution and later returned; its main mass is still in Ensisheim.

Willamette is a 15.5-tonne iron meteorite found in Oregon in 1902, the largest found in the United States, and sacred to the Clackamas people.

Gibeon is a large iron meteorite shower in Namibia, scattered over a huge strewn field in prehistoric times, famous for its delicate Widmanstätten pattern.

After decades of debate, Eugene Shoemaker showed in the early 1960s that Meteor Crater contains coesite and stishovite and shocked rocks, proving it was made by an impact.

Two separate meteorites struck houses in Wethersfield, Connecticut, in 1971 and 1982, an extraordinary coincidence.

In many countries it is legal to own a meteorite that was lawfully found, bought or exported, but the rules vary widely; some countries treat meteorites as national heritage or state property, and collecting may be banned on protected or public land.

In many countries a meteorite belongs to the owner of the land where it lands, but this is not universal; some countries claim meteorites for the state or require them to be reported, so check your local law.

Only if that country's law allows it: many countries freely permit export, but others protect meteorites as heritage and require permits or forbid export entirely, so check before you travel.

Keep meteorites dry, clean and labelled, ideally in individual boxes with silica gel in a stable, low-humidity room, and handle them as little as possible with clean, dry hands or gloves.

Keep it as dry as possible with silica gel in an airtight container, handle it with gloves, never wash it in water, and, for cut and polished pieces, consider a thin protective coating; persistent rust may need advice from a specialist.

Usually as little as possible: brush off loose dirt gently, keep it dry, and avoid water, chemicals, scrubbing or grinding, which can destroy the fusion crust and the evidence scientists need; for a possible new find, don't clean it at all.

A meteorite slice is a thin section cut from a meteorite with a diamond saw and usually polished, revealing internal features such as chondrules, metal grains, crystals or, in iron meteorites, the Widmanstätten pattern.

NWA stands for Northwest Africa. It is the label given to meteorites bought or found in the Sahara region of north-west Africa when the exact place of discovery is not known, followed by a number, as in NWA 7034.

Meteorites are named after the place where they fell or were found, usually a nearby town or geographical feature. Where many are found in one area, such as parts of Antarctica or the Sahara, the place name is followed by a number.

A type specimen is the portion of a newly classified meteorite that is deposited permanently in a recognised scientific collection, so researchers can always go back to the original material.

Start small and well documented: buy a few inexpensive, officially classified specimens of different types from reputable sellers, learn about each one, and build from there.

The Meteoritical Bulletin is the official record of newly approved meteorite names, published by the Meteoritical Society, together with a searchable database of all recognised meteorites.

Many natural history museums display meteorites. In Britain the Natural History Museum in London and National Museums Scotland in Edinburgh have notable collections, and major museums in Vienna, Paris, New York and Washington, DC, hold some of the world's finest.

Yes. Museums, universities and research collections accept donations of meteorites, especially well-documented ones, and donating material is how many important specimens became available for study.

Paired meteorites are separate specimens that turn out to come from the same fall, even though they were found at different times or places and may have been given different names.

Start with affordable, representative specimens: an ordinary chondrite, an iron, perhaps a stony-iron slice and an achondrite, each with its official name and details.

Use closed display cases or boxes away from moisture and direct sunlight, include desiccant for irons, use stable stands, and keep labels with each specimen.

Use soft, even light, a plain background, a scale cube or ruler, sharp focus, and several views: whole specimen, crust detail and cut face.

Give each specimen a number, and record its name, classification, mass, fall or find date, location, source, price, date acquired and photographs.

Many are. Watch dials and jewellery are often made from slices of iron meteorites such as Gibeon or Muonionalusta, but imitations exist, so buy from reputable sellers.

Usually yes, but rules vary. Meteorites are not generally dangerous goods, but customs and export laws apply, and some countries restrict or ban export.

Keep it safe and dry with any labels, find out what it is, and decide whether to keep, donate or sell it, seeking advice from a museum or reputable expert.

Pack it in a padded inner box with desiccant inside a sturdy outer box, use tracked and insured delivery, and include paperwork for international shipments.

No, not privately. Meteorites in Antarctica are collected by national scientific programmes under the Antarctic Treaty and are used for research.

In places where many meteorites are found, such as deserts and Antarctica, they are named after the region plus a number, such as NWA 7034 or ALH 84001.

Yes. Small fragments and micromounts are affordable, take little space and can represent rare types that would be unaffordable as large specimens.

Generally, don't clean it, or only gently brush off loose soil. Water, chemicals and wire brushes can damage the crust and cause rust.

Yes. Trading is common among collectors. Exchange only well-documented specimens, keep records, and make sure both sides understand the terms.

A typical label gives the official name, classification, fall or find date, location, mass and source. Codes such as L6, S3 or W2 describe type, shock and weathering.

An individual is a whole meteorite; an end cut is the end piece left after slicing, with crust on one side; a slice is a thin section cut from the middle.

It varies enormously, from very little for a small, common, weathered stone to a great deal for rare types or historic falls. Type, rarity, condition, size, beauty, documentation and legal provenance all count, and any price is only what a buyer will pay.

Rarity of type, whether it was a witnessed fall, freshness, beauty, historic importance, size and shape, an official classification and trustworthy, legal provenance all raise value. Weathering, damage, doubts over origin or missing paperwork lower it.

Yes, they are among the most sought-after meteorites because they are rare and come from worlds people have barely visited. Value still varies widely with the specimen's type, freshness, size and documentation.

Buy from established, reputable sellers, insist on the meteorite's official name and classification, check that the name appears in the Meteoritical Society's catalogue, and be wary of bargains that seem too good to be true.

A certificate is only as trustworthy as the person who issued it. It is useful as a record of the meteorite's name, type, weight and source, but it is not an independent scientific verification, and anyone can print one.

Because some kinds are far rarer than gold. Thousands of tonnes of gold are mined every year, but some meteorite types are known from only a few kilograms worldwide, and collectors and institutions compete for them.

That is your choice, but first make sure you legally own it, get it confirmed and classified, and consider whether a museum or research group should study it. A fresh fall in particular can be scientifically precious.

It can raise or lower it. Cutting reveals the interior and lets a meteorite be classified and shared as slices, but it destroys a complete specimen's shape and crust and loses material as sawdust, so many prefer unique stones left whole.

Witnessed falls are prized because they are fresh and unweathered, their date and place are known exactly, and they carry a dramatic, documented story. They are also far rarer than finds.

Meteorites are best bought for interest and enjoyment, not as investments. Prices vary, the market is small, and selling can be difficult.

Because meteorites vary hugely in rarity and size, sellers often price them per gram, adjusting for type, quality, crust and history.

If it is valuable, yes. Check whether your home insurance covers it, keep a catalogue, photographs and receipts, and consider specialist cover for high-value pieces.

Historic falls carry stories, early scientific importance and limited supply, so specimens from them are prized by collectors and museums.

Sometimes. Museums acquire meteorites by purchase, donation, exchange and fieldwork, and are especially interested in scientifically important or historic specimens.

Some countries treat meteorites as national property or heritage, banning their sale or export, and Antarctic meteorites are reserved for science.

Yes. Major auction houses hold sales of meteorites, especially large irons, pallasites, lunar and Martian specimens and historic falls, alongside dealers and online sales.

No, meteorites are not toxic, hot or harmfully radioactive by the time you hold them. The main reasons for care are to protect the meteorite from skin oils and moisture, and to avoid sharp edges.

Only very slightly, and not dangerously. Like all rocks they contain traces of natural radioactive elements, and cosmic rays in space create a few extra radioactive atoms, but the levels are tiny and safe to handle.

Yes, but only a handful of well-documented cases exist. The best known is Ann Hodges, who was bruised by a meteorite while resting on her sofa in Alabama in 1954.

Extremely small: there are only a few reliably documented injuries in all of recorded history, so the risk to any one person in a lifetime is far lower than everyday hazards such as lightning or road accidents.

A very large impact could cause a mass extinction, as one did 66 million years ago, but sterilising the whole planet would need an object far larger than any known to be on a collision course; no known large asteroid threatens Earth in the foreseeable future.

NASA funds sky surveys that find and track near-Earth objects, calculates their future orbits, coordinates planetary defence through a dedicated office, and has tested a way to deflect an asteroid with the DART mission.

DART (Double Asteroid Redirection Test) was a NASA spacecraft that deliberately crashed into the small asteroid Dimorphos on 26 September 2022, shortening its orbit around a larger asteroid by about 32 minutes and proving that an asteroid can be nudged off course.

Yes. Ordinary meteorites are not toxic or noticeably radioactive, so children can handle them safely with adult supervision, washing hands afterwards and never tasting, cutting, heating or applying chemicals to them.

Acid and heat are genuinely dangerous outside a laboratory, they rarely tell an amateur anything useful, and they can permanently damage a meteorite's scientific and collecting value.

Almost never. Small meteorites are usually cool or merely warm when they land, so they very rarely ignite anything; only large airbursts or impacts release enough heat to set fires.

It can be. Cutting and grinding create fine dust that may contain silica, nickel and other substances, so it should be done with water, ventilation and a suitable mask.

There is no evidence that meteorites carry living organisms from space, let alone harmful ones. Germs on meteorites come from Earth after they land.

Yes. Meteorites are safe to keep at home, including in bedrooms. Their natural radioactivity is extremely low, and they give off no harmful gases.

It is safe, but for science, try not to touch it with bare hands. Use clean aluminium foil or a clean bag, keep it dry and contact a museum quickly.

Very rarely. Most fireballs are harmless, but a very large airburst, such as Chelyabinsk in 2013, can break windows and injure people with flying glass.

Only with careful planning. Deserts bring heat, dehydration, getting lost and vehicle breakdowns, and some regions have security risks and legal restrictions.

Make sure everyone is safe, photograph the damage and the meteorite, contact your insurer, and report the meteorite to a museum or fireball network.