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sault18 t1_j4zoyr1 wrote

Reply to comment by MrMe_1621 in Are Two Tidally Locked Earth in One Solar System Possible? by Thirdy-DOg

Isn't Theia hypothesized to either have formed or migrated into Earth-Sun L4 or L5 point and then had to be gravitationally nudged out of there by Jupiter and / or Venus?

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pmMeAllofIt t1_j527nft wrote

L4/5 isn't stable for larger object. If Theia collected enough mass it would nudge itself out without the help of other bodies of mass. Being about 10% Earth's mass in the Sun-Earth L4/5 points I believe.

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