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speedywilfork t1_je5cj4g wrote

considering that the moon collided with earth billions of years ago. this is no surprise.

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KurtisLloyd t1_je5otr4 wrote

Iirc, a mass roughly the size of Mars collided with the Earth. The debris that was expelled from the collision was caught in the now larger planet’s gravitational field. At one point, the earth had a ring, that slowly accumulated into one large mass becoming our moon. I took some astronomy courses years ago, and that was what we were told about the formation of the moon.

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speedywilfork t1_je5p78r wrote

yep, exactly. and that is the only reason our planet is inhabitable

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Buscemi_D_Sanji t1_je7xgyj wrote

Lol you can't say the moon collided with earth, get told that actually, something hit earth to form the moon, and then say "exactly" haha

And the Theia collision may be a significant source of the water on earth, but it's definitely not certain. Some people think that comet and asteroids had already contributed most of the water on earth before that happened, but that also isn't too certain.

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speedywilfork t1_je9viyb wrote

i was using TLDR. i didnt want to go into details like the other poster did.

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