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The mass, a quarter mile (400 meters) in diameter, quickly stood out for scientists because of its extreme orbit, coming from the direction of the constellation Lyra
originally posted by: Alien Abduct
a reply to: intrptr
My guess is it might have something to do with speed. Other than that I have no idea how they could tell. I would love for them to get a sample of that thing if it is in fact interstellar though!