Lunar impact: how the Moon’s Mare Orientale was formed

29 October 2016 Astronomy Now

The Moon’s Orientale basin is an archetype of “multi-ring” basins found throughout the solar system. New research has enabled scientists to reconstruct Orientale’s formation using data from NASA’s GRAIL mission. It is now thought that the 580-mile-wide feature was created 3.8 billion years ago by an impacting object some 40 miles across travelling at about 9 miles per second.

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Mars Express spies an ancient impact crater

24 July 2016 Astronomy Now

This striking perspective view from ESA’s Mars Express shows an unnamed but eye-catching impact crater on Mars. This region sits south-west of a dark plain named Mare Serpentis (literally ‘the sea of serpents’), which in turn is located in Noachis Terra (literally ‘the land of Noah’).


Scientists find fresh impact craters near the Moon’s south pole

23 May 2016 Astronomy Now

Using data from NASA’s Lunar reconnaissance Orbiter, scientists have discovered two geologically young craters — one 16 million, the other between 75 and 420 million years old — in the darkest regions of the Moon’s south pole. Such craters provide valuable information on the frequency of collisions in the solar system.