Astronomers Record First Observation of an Interstellar Object

Astronomers have spotted an interstellar visitor for the first time.

It’s either a comet or an asteroid, and came speeding right through the heart of our solar system; after a hairpin turn around the sun, it’s now on its way back out of our cosmic backyard. Scientists at the University of Hawaii’s Pan-STARRS 1 telescope at Haleakala first spotted the quarter-mile-wide object on Oct. 19, and knew immediately that it was something different.

“Its motion could not be explained using eithe

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