The leading explanation for all of these mysteries is known as the giant impact hypothesis. According to this story, when the solar system was just getting started, a Mars-size protoplanet named Theia ...

What are some of the largest extraterrestrial impacts to effect Earth? Learn what we’ve seen in history, and what is ...

The heavy core of Theia sank deep into Earth, enlarging our planet's core. The two bodies' mantles mixed and thus bulked up our planet. And the crusts were scattered far into space. What happened ...

Moon is slowly moving away from Earth at a rate of 3.8 centimetres per year. This gradual drift affects Earth’s rotation and ...

Despite its reputation, outer space is far from empty, and the region around our planet is particularly riddled with space ...

Our own planet, for example, had a devastating rendezvous with its ... While many of these coalesced into the planets we know today (like Theia’s violent combination with Earth roughly four billion ...

Theia, a theoretical ancient planet about the size of Mars, is believed to have collided with Earth during its infancy, triggering debris that collected to later form the moon. However, contrary to ...