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 ...

Hubble Space Telescope images have revealed a second massive collision between planetary bodies orbiting the nearby star ...

Seismic waves created by earthquakes as they travel through the planet’s interior change speed and direction as they move through different materials. Things like rock type, density, and temperature ...

Add Yahoo as a preferred source to see more of our stories on Google. A normal looking moon on the left. On the right is a diagram of the moon sliced in half. Over 4.2 billion years ago, the moon ...

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 bright new lunar crater detected in spacecraft images shows that asteroid impacts continue to reshape the Moon’s surface ...

China’s Chang’e-6 mission has returned nearly two kilograms of rock and soil from the moon’s far side, and the laboratory ...

Over 4.6 billion years ago, Earth took shape from a spinning cloud of dust and gas surrounding the young sun. Tiny particles within this cloud collided and clumped together, driven by gravity and ...

There's a new theory for how the Moon came to be that would solve some of the Giant Impact Hypothesis' issues. If Earth had a magma ocean on it already, a lot of problems work out. Share on Facebook ...