For the first time, humans have detected an interstellar asteroid—a space rock they're calling 'Oumuamua, which is a Hawaiian word meaning "scout." It's the only object we've ever seen that entered the solar system from beyond our little collection of planets. That's a pretty big deal on its own. But on top of that, this asteroid has a really interesting shape: It's very long and skinny, with a width to length ratio of about 1 to 10.

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