Theia (/ˈθiːə/) is a hypothesized ancient planet in the early Solar System which, according to the giant-impact hypothesis, collided with the early Earth...

hypothetical protoplanet called Theia with Earth, early in the Solar System's history.[citation needed] In the inner Solar System, the three protoplanets to survive...

and the agnostics. The name of the hypothesised protoplanet is derived from the mythical Greek titan Theia /ˈθiːə/, who gave birth to the Moon goddess Selene...

unique and distinct signature for each Solar System body. If Theia had been a separate protoplanet, it probably would have had a different oxygen isotopic...

planetary formation and the hypothesised collision of the trojan dwarf planet Theia with the proto-Earth. A revised proposal in 2012 suggested the Chaotian...

to escape from the interior of Earth into space. A theoretical protoplanet named "Theia" is thought to have collided with the forming Earth, and part of...

originated as debris resulting from a collision between Mercury and another protoplanet, stripping away much of Mercury's inner crust and mantle. None have been...

hypothesis, the Moon formed after a collision between two co-orbital objects: Theia, thought to have had about 10% of the mass of Earth (about as massive as...

attracted each other, coalescing to form ever larger bodies. Hundreds of protoplanets may have existed in the early Solar System, but they either merged or...

may be many protoplanets orbiting the star or each other, but over time many will collide, either to form a larger, combined protoplanet or release material...