See our complete coverage of planet Proxima b. This Earth-sized alien world, discovered orbiting Proxima Centauri, may be able to host life.
from Space.com ift.tt/2bj1aAf
See our complete coverage of planet Proxima b. This Earth-sized alien world, discovered orbiting Proxima Centauri, may be able to host life.
from Space.com ift.tt/2bj1aAf
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