Earth, sun, moon: three objects in space whose interactions have a pretty big impact on our lives. Earth orbits the sun once a year, and it rotates on its axis about once a day (depending on your ...

Conventionally, the moon is thought to have formed during one big impact, but a three-impact model might make more sense ...

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 ...

Surprisingly enough, the moon is a piece of our planet. The moon is weird. It's completely unlike anything else in the solar system. So how did our planet end up with such a special moon? The answer ...

Roughly four and a half billion years ago the planet Theia slammed into Earth, destroying Theia, melting large fractions of Earth’s mantle and ejecting a huge debris disk that later formed the moon.

The mystery of the Earth and Moon’s similarity Early models of the Moon’s formation predicted that the Moon should mostly consist of Theia’s material. But scientists noticed a puzzle: Earth and the ...