Recent research suggests that the thick, heavily cratered crust on the Moon's far side could be the pasted-on remains of a second satellite that once orbited the early Earth.
In a new twist on the giant impact theory, a new idea posits that the Moon might have formed from the vaporized remains of Earth after an epic collision with another planet-sized body.
One of the solar system's most nagging problems literally stares into the collective faces of planetary scientists on many nights every month. It's the Moon — or, specifically, how it came to exist.
Researchers have announced interesting news concerning the Moon, especially about how and when it formed, and why the "Man in the Moon" constantly stares at us whenever the lunar disk is fully lit.
New studies offer contrasting scenarios for making the Moon. One argues for a one big splat early in solar-system history; a second envisions a score of lesser blows that built up the Moon over time; and a third suggests water was involved.