Astronomers Discover “Deep Structure” Under Moon’s Largest Crater

A team of astronomers found a “large excess of mass” under the Moon’s largest crater, the Aitken basin — likely a relic from an ancient asteroid impact event, but perhaps something much stranger.

“Imagine taking a pile of metal five times larger than the Big Island of Hawaii and burying it underground,” said lead author Peter B. James from Baylor University in Waco, Texas in a statement. “That’s roughly how much unexpected mass we detected.”

Astronomers Discover “Deep Structure” Under Moon’s Largest Crater