> ...But are the stars of a group that could have planets capable of
> supporting life as we know it?  They would have to be of the G-2
> class.
As I recall Sol is a G-4 star.  I don't see why a class M or K star
couldn't support life if the planets were closer, or why a B star
couldn't if the planet was further away.  Each star would have it's
own "life zone" where a planet could exist that could provide it
with earth-like conditions.
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