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After scanning the vast reaches of the cosmos for Earth-like planets where life might exist, astronomers have found one right next door.
A planet that is rocky like Earth and only slightly bigger has been discovered orbiting Proxima Centauri , the nearest star to our solar system, scientists reported Wednesday. It is probably in the not-too-hot, not-too-cold ‘Goldilocks Zone’ where liquid water — a key to life — is possible if the planet has an atmosphere. And it is a mere 4.22 light-years from Earth or 25 trillion miles.
It is easily the closest potentially habitable planet ever detected outside our solar system – and one that could be reachable by tiny, uncrewed space probes before the end of the century, in time for some people alive today to witness it.
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The planet Proxima b orbiting the red dwarf star Proxima Centauri, the closest star to our Solar System, is seen in an undated artist’s impression released by the European Southern Observatory August 24, 2016.ESO | M. Kornmesser / via Reuters
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