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Old November 6 2013, 10:32 PM   #11
Metryq
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Re: 1 in 5 stars have earth-like planets around them!

B.J. wrote: View Post
A lot of that has to do with the the moon only getting some of the lighter materials...
My point was that being within the "habitable zone" does nothing to increase the "chances" that the planet is suitable for a biosphere.

It doesn't take into account other factors like the planet or moon having internal heat due to gravitational stresses.
Gravitationally induced heat, or the local star(s) are far from the only sources of heat or energy. And we're still learning the subtleties of Earth's energy economy.
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