Asteroid that formed moon's Imbrium Basin may have been protoplanet-sized
Wednesday, July 20, 2016 - 13:51
in Astronomy & Space
The asteroid that slammed into the moon 3.8 billion years ago creating the Imbrium Basin may have had a diameter of at least 150 miles, according to a new estimate. The work helps explain puzzling geological features on the moon's near side, and has implications for understanding the evolution of the early solar system.