http://upload.wikimedia.org/wikipedia/commons/thumb/7/75/Habitable_zone_with_Gliese_581c_and_Gliese_581d.sv g/491px-Habitable_zone_with_Gliese_581c_and_Gliese_581d.sv g.png (broken link)
http://www.centauri-dreams.org/?p=7397
Gliese 581 d: A Water World? [Updated] - Achenblog
Quote:
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Originally Posted by Stephane Udry
"At this point we can just say that a small-mass planet is there at a good distance for water to exist on the surface and thus for life potentially to develop. Only observations will tell us if there is life there."
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