SUNSET: 
Bits of Theia Might Be in Earth's Mantle
A "smoking gun" for the ancient calamity that formed Earth’s large Moon may still exist deep in the mantle of our planet.
Two Impacts, Not Just One, May Have Formed The Moon
The Moon may have formed in a one-two punch, new simulations suggest.
Could a Long-Ago Collision Explain Our Two-Faced Moon?
New research shows that a planetoid impact could have made our Moon asymmetric.
Could a Giant Impact Have Vaporized Earth to Create the Moon?
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.
When and How Did the Moon Form?
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.
Three New Findings About the Moon
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.
Making the Moon Anew
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.
Big Splat Could Have Reshaped the Moon
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.
