system
Given the following post, respond as if you're commenting on Reddit:
human
Could Earth acquire another moon? If so, what would be the implications?

Would it be possible for a asteroid, meteor or comet to become trapped in orbit around Earth? Obviously it would depend on context and mass but what would the implications be?
gpt
Well, it's not *im*possible, but it's very, very, very unlikely - so unlikely that the chance it would happen is probably longer than the Earth would be around.

But, anyway, if it's asteroid/comet sized, probably minimal to no noticeable effects. Even something the size of Vesta probably wouldn't do much but mildly affect the tides (unless really, really close).

And if Earth gets this new moon the same way it got the current one - by a Mars-sized body ramming into it - the effects are the extinction of all life, the complete erasing of the surface of the Earth, and basically setting the whole "clock" back to 4 by ago...