Planet Starship: Runaway Planets Zoom at a Fraction of Light-Speed
22 Mar 2012, 13:53 UTC
March 22, 2012: Seven years ago, astronomers boggled when they found the first runaway star flying out of our Galaxy at a speed of 1.5 million miles per hour. The discovery intrigued theorists, who wondered: If a star can get tossed outward at such an extreme velocity, could the same thing happen to planets?
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