4 ms·
AIUI, the heat of the collision would've melted everything that wasn't already molten. Any "age" information would be lost as the system cooled. At least, that'
by politician 5y ago
AIUI, the heat of the collision would've melted everything that wasn't already molten. Any "age" information would be lost as the system cooled. At least, that's my understanding from playing with Universe Sandbox.
- vlovich123 5y agoThat would only be the case for the piece that collided though right? The side that wasn’t part of the collision should have retained its age information. Also, presumably Theia didn’t bounce off but just merged with the moon being formed from the piece of Earth on the opposite side from the collision that got ejected, right? So at most half the moon surface should be from the collision and half of it should have the age of the Earth?