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This artist's rendering shows the first interstellar asteroid: 'Oumuamua. This unique object was discovered on Oct. 19, 2017 by the Pan-STARRS 1 telescope in Hawaii. The University of Toronto's Alan Jackson reported Monday, March 19, 2018, that the asteroid — the first confirmed object in our solar system originating elsewhere — is probably from a binary star system. That's where two stars orbit a common center. According to Jackson and his team, the asteroid was likely ejected from its system as planets formed. (M. Kornmesser/European Southern Observatory via AP)

This artist's rendering shows the first interstellar asteroid: 'Oumuamua. This unique object was discovered on Oct. 19, 2017 by the Pan-STARRS 1 telescope in Hawaii. The University of Toronto's Alan Jackson reported Monday, March 19, 2018, that the asteroid — the first confirmed object in our solar system originating elsewhere — is probably from a binary star system. That's where two stars orbit a common center. According to Jackson and his team, the asteroid was likely ejected from its system as planets formed. (M. Kornmesser/European Southern Observatory via AP)

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