We're not alone in the universe. At least, our sun isn't. It's got a next-door neighbor in Alpha Centauri, a system that features not one, not two, but three stars and attendant planets. But as researchers have recently discovered, one of those stars might not be an original resident of this neighborhood — it might have even been stolen.
The Star on the Milk Carton
Along for the Ride
The First Earth-Sized World of Alpha Centauri
Written by Reuben Westmaas October 30, 2017
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