Thursday, August 7, 2014

Life May Take Two

A new study argues that having other planets outside a planet in the habitable zone of a red dwarf star can lengthen the time such a world can support life.  Red dwarfs are the most common and longest-lived stars in the universe.

Outer planets would gravitationally interact with the one in the habitable zone, heating it with internal friction and keeping it geologically active.  That's important, as geologically dead worlds cannot support life.

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