6 years ago
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Alien Asteroids Are Here, Scientists Say. Get Used to Them.
An asteroid that cohabits an orbit with Jupiter came from outside the solar system.
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https://www.nytimes.com
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This doesn't seem like such a big deal to me. I'd assumed that at least some of the stuff in our solar system might have come from outside of it, it doesn't seem that surprising to me. But maybe I just don't know enough astronomy to find it surprising.