A detailed supercomputer simulation of a titanic impact on early Earth shows the moon may have formed much faster than scientists imagined.

This graphic illustrates how the moon may have formed after multiple collisions on Earth. Moon- to Mars-sized impactors strike the Earth and leave a disk of debris orbiting the planet.

The Moon is the Earth's only natural satellite, but where did it come from? Most scientists accept that the Moon was formed after a Mars-sized object, known as Theia, glanced off the Earth around ...

The moon was born in the collision of a Mars-sized body and the early Earth, but beyond that, much about the world we see in our skies every night is still a mystery. After 61 missions, including ...

A new analysis of lunar rocks now supports the idea that the moon was born in a gigantic collision between the nascent Earth and a mysterious planet-size rock, scientists say. Earth formed about 4 ...

We already know a decent amount about how planets form, but moon formation is another process entirely, and one we're not as ...

Billions of years ago, so the theory goes, something around the size of Mars smacked into Earth, spewing a whole bunch of dirt into space that eventually coalesced to form the Moon. This is called ...

Scientists have been puzzling over the moon's formation for a long time, and now there's a new theory that might explain some of the baffling mysteries surrounding our satellite. A new study ...

The moon may have formed in the aftermath of a massive Earth-vaporizing collision that could have created something called a synestia, according to a new study.

The moon, many now believed, was formed from the debris of a powerful collision between the early Earth and a planet the size of Mars.

The moon formed from the collision of the Earth with a Mars-sized object named Theia. Now, astronomers have answered mysteries around this ancient event.

The formation of the Moon may have come harder on the heels of Earth's birth than we thought. According to a new analysis by researchers from the US, France, and Germany, Earth's constant ...