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 ...

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 ...

Have you ever wondered why we always see the same side of the Moon, no matter where we are on Earth? While the Moon appears motionless, it’s spinning on its axis. However, due to a phenomenon ...

The formation of the moon wasn't the result of one massive cataclysmic clash of planets — rather, researchers say our moon formed when small "moonlets" came together.

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 theory has arisen as to how the moon was formed. According to researchers at NASA, the moon-- and Earth-- was part of… ...

It takes a much smaller collision than scientists had thought to get an Earth and Moon that look the way they do today.

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.

A new simulation puts forth a different theory – the Moon may have formed immediately, in a matter of hours, when material from the Earth and Theia was launched directly into orbit after the impact.

The moon, it seems, may have been formed not from a single collision, but a whole series of them, all in one brief, chaotic period in the solar system’s history.

New research solves a longstanding mystery about the moon's makeup by proposing that the Earth had a molten crust when the moon was formed.