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 companion ...

The universe has quasi-moons, mini-moons, and moonlets, but no official definition of what counts as a moon.

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 the ...

Scientists have studied our solar system, which is home to eight major planets and more than 400 known moons orbiting six of them, to understand the new phase of the moon formation observed around ...

The Moon's formation may not just have smashed Earth -- it may have stretched our planet into a potato for millions of years afterwards. Share on Facebook (opens in a new window) Share on X (opens in ...

The conventional explanation for the moon's formation is that an enormous rock smashed into the nascent Earth and created it as a result. A new theory challenges the particulars of how events may have ...

A crucial difference in the “fingerprints” of Earth and the moon confirms an explosive, interconnected past Within the first 150 million years after our solar system formed, a giant body roughly the ...