Do Space Aliens Need Baptism? The View From Gliese 581g
…ere 20 light years away in the constellation Libra. This in itself is not too big a deal, because the discovery of planets orbiting other stars (termed “exoplanets”) has become a weekly occurrence. But this planet is special because (1) it’s massive enough to retain an atmosphere, and (2) it resides squarely in the center of the so-called habitable zone of its parent star, red dwarf Gliese 581. So far as we know (and that may not be very far, admi…
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