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The MESSENGER probe discovered Mercury's Rembrandt (pictured) – the second largest impact crater on the planet.
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MESSENGER
NASA mission to Mercury
MESSENGER was a NASA robotic space probe that orbited the planet Mercury between 2011 and 2015, studying Mercury's chemical composition, geology, and magnetic field. The name is a backronym for Mercury Surface, Space Environment, Geochemistry, and Ranging, and a reference to the…Source: Wikipedia (CC BY-SA)
Rembrandt (crater)
Crater on Mercury
Rembrandt is a large impact crater on Mercury. With a diameter of 716 km it is the second-largest impact basin on the planet, after Caloris, and is one of the larger craters in the Solar System. It was discovered by MESSENGER during its second flyby of Mercury on October 6,…Source: Wikipedia (CC BY-SA)
Impact crater
Circular depression in a solid astronomical body formed by the impact of a smaller object
An impact crater is a depression in the surface of a solid astronomical body formed by the hypervelocity impact of a smaller object. In contrast to volcanic craters, which result from explosion or internal collapse, impact craters typically have raised rims and floors that are…Source: Wikipedia (CC BY-SA)