The asteroid Vesta has a very unique chemical composition (and it's also optically distinct). That's why it's been possible to identify a few meteorites on Earth as fragments of this particular asteroid, or at least asteroidal fragments that are very similar to it, i.e., from the same asteroidal composition family.
Now it appears that pieces of asteroid Vesta have been found on asteroid Bennu. Watch the video to find out more.
So, in a short time, OSIRIS-REx will be lowering to the surface of Bennu to grab a sample and bring it home to Earth. Wouldn't it be funny if it accidentally brought back a chunk of Vesta? Because we already have a few of those.
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