Approximately how large was the protoplanet Theia that collided with Earth?
Answer
Mars-sized
Theia is characterized as a Mars-sized protoplanet in the context of the Earth-Moon formation. This scale is crucial because an object roughly half the size of Earth, or approximately Mars-sized, would possess the necessary mass and kinetic energy to create the vast plume of debris required to form the Moon. A smaller object would not have generated sufficient orbital material, while a much larger object might have destroyed the Earth entirely during the collision.
Related Questions
What is the primary scientific name for the theory explaining the origin of the Moon?Approximately how large was the protoplanet Theia that collided with Earth?Which elements serve as isotopic evidence for the shared heritage of the Earth and the Moon?Why is the Co-accretion theory generally considered insufficient to explain the Moon?Approximately how long ago did the impact involving Theia occur?What do recent computer simulations suggest about the speed of the Moons formation?Why does the Moon lack water and other volatile compounds compared to the Earth?What became of the remnants of the protoplanet Theia after the collision?What does the angular momentum of the Earth-Moon system reveal about the impact?Why are fragments of Theia not easily found on the surface of the Earth today?