| Theia (planet) |
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According to the theory, Theia would have been approximately Mars -sized and developed in the Earth-Sun L4 position, similarly to Trojan Asteroid s. However, it would cease to be in a stable position due to its growing mass crossing the threshold at which it could no longer be considered negligible for a two-body Earth-Sun problem. It would begin to oscillate between approaching Earth and receding from Earth, before finally approaching close enough to fall along a path which would lead to a moderate-velocity impact (the glancing angle) with Earth. In Greek Mythology , Theia was a Titan who gave birth to the Moon goddess Selene . Another name often given to this hypothetical planet is Orpheus . |
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