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meteors & meteorites

An impact on the surface of Mars creates a shower of debris.
Posted inNews

Martian Meteorites Reveal Evidence of a Large Impact

by Katherine Kornei 15 March 202215 March 2022

By analyzing rare Martian meteorites, researchers have uncovered a crystalline structure created by a large asteroid or comet impact that potentially affected the Red Planet’s habitability.

Parka-clad volunteers collecting a meteorite that fell in Antarctica
Posted inNews

Machine Learning Pinpoints Meteorite-Rich Areas in Antarctica

by Katherine Kornei 1 March 202210 May 2022

A new algorithm suggests that only a small fraction of meteorites present on the White Continent’s surface have been recovered to date.

Martian meteorite ALH84001 shown with a 1-centimeter cube for scale
Posted inNews

A New Explanation for Organics on a Mars Rock That Fell to Earth

by Derek Smith 26 January 20228 March 2022

Organic molecules on a Martian meteorite have fueled nearly 30 years of scientific debate. New evidence suggests they were formed by Martian processes, offering more support for a once habitable environment on the Red Planet.

A bolide in the sky
Posted inNews

Data from Satellites Help Uncover Exploding Meteors

by Emily Moskal 13 December 202113 December 2021

By using data from two lightning-spotting satellites, researchers measure explosions of thousands of small meteors and create a database that could help the planetary defense community.

Wearing a white lab coat, Yiming Zhang, a doctoral student at the University of California, Berkeley, sits in front of a computer screen, examining data, with a mouse in his right hand. To his left, a gray microscope with four copper-colored rings encircling the stage perches on a black table.
Posted inNews

Diamonds Are a Paleomagnetist’s Best Friend

by Alka Tripathy-Lang 19 October 202114 March 2023

Typical paleomagnetic measurements average a sample’s signal. The quantum diamond microscope helps scientists make micrometer-scale maps of magnetism, showing where a sample locked in its magnetic signatures.

Bull’s-eye features in rock
Posted inNews

Ejecta Discovered Near Site of Ancient Meteorite Impact

by Katherine Kornei 17 August 20218 April 2022

South Africa’s Vredefort impact structure is the largest on the planet, and researchers have now discovered the first proximal ejecta possibly deriving from the cataclysmic impact.

A lump of glass
Posted inNews

Glassy Nodules Pinpoint a Meteorite Impact

by Katherine Kornei 5 August 20215 May 2022

Researchers working in Chile’s Atacama Desert have collected thousands of “atacamaites” that suggest a meteorite struck the region roughly 8 million years ago.

Asteroids in space
Posted inNews

A Remarkably Constant History of Meteorite Strikes

by Katherine Kornei 13 July 20214 October 2021

Researchers dissolve chunks of the ancient seafloor to trace Earth’s impact history and find that colossal clashes between asteroids don’t often trigger an uptick in meteorite strikes.

Chart plotting the evidence presented in the commentary by Weiss and Bottke.
Posted inEditors' Highlights

Fingerprints of Jupiter Formation

by Bethany Ehlmann 16 June 202127 January 2022

Meteorite isotopes, meteorite paleomagnetics, and planet formation models collectively show Jupiter formation via first slow then fast collection of material by core accretion in <5 million years.

Slice of a meteorite determined to have originated on Mars on the basis of its minerology and gases trapped in the rock.
Posted inNews

Martian Meteorites Shed Light on Solar System’s Early Dynamics

by Mara Johnson-Groh 24 May 20214 October 2021

Chemical compositions of rocks from Mars indicate that the earliest orbits of Jupiter and Saturn were more circular than they are today.

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