Skip to main content
Theia

Theia

1 9.9
A possible ancient planet the size of Mars that hit early Earth and helped form the Moon
  • proper noun
  • Specialized
: Theia
  • Research indicates that the materials from Theia may have played a crucial role in forming the Moon after the collision.

Examples

  • Scientists believe that Theia was a Mars-sized planet that contributed significantly to the Earth's development.

  • The hypothesis suggests that Theia collided with the early Earth, leading to the formation of the Moon.

  • Which is great and all, but we're left thinking, what happened to Theia, and is it coming round again?

    Blog text (30)
  • There are still some unanswered questions, primarily surrounding the size of Theia and the effect it would have had on the rate of Earth's rotation.

    Blog text (30)

Synonyms

protoplanet
vsTheia
  • Specialized
1 9.4

A young body in space that is becoming a planet

is a specific ancient Mars-sized object whose collision helped form the Moon

Surface Forms

Theia main

Etymology

Theia as the name for a possible ancient planet also comes from that same Greek word for 'goddess' or 'divine', and scientists used the myth name because this planet is thought to have hit the early Earth and helped form the Moon.