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craters

Two-image animation of a location on Mercury’s surface showing a small impact event
Posted inResearch Spotlights

MESSENGER Reveals a More Dynamic Mercury Surface

by Morgan Rehnberg 28 September 202225 January 2023

Image pairs indicate that 99% of the planet’s surface could be altered in the next 25 million years.

Artistic interpretation in which part of Earth is seen from above, and a bright trail of light pierces clouds and ends in what looks like an explosion
Posted inNews

Impact Crater off the African Coast May Be Linked to Chicxulub

Katherine Kornei, Science Writer by Katherine Kornei 19 September 202213 October 2022

The underwater crater, spotted serendipitously in commercial observations of seafloor sediments, is believed to have formed at roughly the same time as the famous Cretaceous-Paleogene impact event.

Wireframe view of the Mare Tranquillitatis pit.
Posted inEditors' Highlights

The Shape of Pits on the Moon

by Laurent G. J. Montési 24 August 202222 August 2023

Three-dimensional reconstructions enable virtual exploration of pits on the Moon.

Illustration of two spacecraft near the Moon, with Earth in the background.
Posted inNews

Moon’s Porosity Changes Cratering History, Study Says

Damond Benningfield, Science Writer by Damond Benningfield 3 August 20224 October 2022

Gravity field measurements from decade-old lunar orbiter provide a proxy for counting craters.

Model of the evolution of the Serenitatis Basin, on the near side of the Moon.
Posted inEditors' Highlights

An Impact Basin Thermometer for the Moon

by Laurent G. J. Montési 22 April 202216 June 2022

Large impact basins on the near side of the Moon lack the annulus of thickened crust that far-side basins have. The difference can be linked to the thermal structure of the lunar crust.

A wall of ice looms over an expanse of rocks.
Posted inNews

Impact Structure Hidden Under Arctic Ice Dates to the Paleocene

Katherine Kornei, Science Writer by Katherine Kornei 13 April 202213 April 2022

Greenland’s Hiawatha impact structure, more than 30 kilometers in diameter, is much older than previously thought, new results suggest.

A satellite view of the Vredefort impact structure in South Africa
Posted inNews

A Giant Impact Triggered Earthquakes for Thousands of Years

Katherine Kornei, Science Writer by Katherine Kornei 2 February 202214 February 2022

When an asteroid struck South Africa during the Precambrian, earthquakes rocked the region for millennia as Earth’s crust reequilibrated, new research reveals.

Bull’s-eye features in rock
Posted inNews

Ejecta Discovered Near Site of Ancient Meteorite Impact

Katherine Kornei, Science Writer 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

Katherine Kornei, Science Writer 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.

Map of thorium concentrations across the South Pole–Aitken Basin on the Moon’s farside
Posted inResearch Spotlights

Moon’s Largest Crater Holds Clues About Early Lunar Mantle

by Elizabeth Thompson 12 February 202128 January 2022

An ancient impact splashed evidence of the Moon’s early mantle makeup onto its surface. Now researchers are piecing together models, maps, and samples to bring these mysteries to light.

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