We do not know for sure if Theia existed and if it collided with the young proto-Earth, but the evidence is compelling. For one, we are the only rocky planet with a substantial moon. Mercury and ...

The heavy core of Theia sank deep into Earth, enlarging our planet's core ... And a big chunk remained in orbit. In as little as a few hours — or perhaps up to a century or more — that ...

sending the moon into orbit and then flying away into space. But this new research says that Theia never left Earth and instead, it helped shape up our planet. Scientists studied oxygen isotopes ...

Scientists have detected a potential exoplanet using an unusual method — tracking shifts in another planet’s orbit. The hot Jupiter TOI-2818b was found to have an unexpected timing variation, hinting ...

The Earth and Moon system we see today was formed when Theia, an ancient planet about the size of Mars ... or highly inclined to the Earth-Moon orbit are subject to two competing effects: nodal ...

These structures are theorized to contain remnants of Theia's materials ... the stars ‘Snowball Earth’: How volcanoes saved our planet from its deepest freeze in history ...