A striking black and white image of the Mare Orientale impact basin on the Moon's western edge, captured by NASA's Lunar Orbiter 4 in 1967. The photo showcases the basin's three concentric rings, formed by an ancient asteroid impact over 3 billion years ago. The dark, smooth mare (Latin for sea) is a result of molten lava flooding the impact site.

Astronomy Picture from 23/11/2002

Mare Orientale

Source: https://apod.nasa.gov/apod/ap021123.html


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