Proxima b: Alien life could exist on 'second Earth' found orbiting our nearest star in Alpha Centauri system Proxima b in 60 seconds Play! 01:06 Sarah Knapton , science editor , video by vin shahrestani 24 AUGUST 2016 • 6:00PM I t is invisible to the naked eye from Earth and outshone by the bright glow of Alpha Centauri, but our closest star is holding an intriguing secret, scientists have discovered. Proxima Centauri, which lies in our nearest star system, is orbited by a rocky planet that is so similar to Earth that it could harbour life. The planet, dubbed ‘Proxima b’ is only four light years away, just next door in astronomical terms, and sits in a position known as the Goldilocks Zone , where the temperature is mild enough for water to remain liquid. An artist's impression of the newly discovered Proxima b planet which orbits our nearest star CREDIT: ESO/M. KORNMESSER H undreds of exoplanets have be
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