Group 10 Exoplanets And Aliens

Steven Vogt, a professor of astronomy and astrophysics at UC Santa Cruz, said he had "almost no doubt" (which seems slightly different than 100 percent sure) that life exists on Gliese 581g, an exoplanet Vogt and colleagues discovered via the Keck Observatory that is orbiting in the "habitable zone" surrounding the red dwarf Gliese 581. The "habitable zone" — a term some scientists are loath to use given the many variables at play in planetary science — is the sweet spot that is neither too far or too close to the star such that surface water might exist there.

http://futurismic.com/2008/11/14/hubble-telescope-directly-observes-an-exoplanet

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