stanerd OP t1_jbw7k4j wrote
Reply to comment by the_fungible_man in What if an interstellar object like Oumuamua crashes into Earth? by stanerd
What happened to the planet that slammed into Earth? I assume the Moon formed from the debris from that collision.
[deleted] t1_jbw910p wrote
This cool NASA animation shows the most recent idea of how it happened. https://youtu.be/kRlhlCWplqk
the_fungible_man t1_jbw8pt7 wrote
Most of the impactor (estimated to have been approximately the size of Mars) was incorporated into the Earth, while debris from the collision, partly from the Earth and partly from the impactor, coalesced to form the Moon.
ZalmoxisRemembers t1_jbwids2 wrote
Check out https://en.wikipedia.org/wiki/Large_low-shear-velocity_provinces and this video about them: https://youtu.be/X-EZjEJc8Bo
The theory is that these large objects we see in the mantle are remnants of Theia (the planet that crashed into Earth).
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