Re: Rare Earths
Interesting, when viewing 'the whole picture' (graphically speaking lol), how there does seem to be an order to star class groupings (most red dwarfs together, Gs/G2/Go's together, etc.):
http://www.anzwers.org/free/universe/50lys.html
Who is to say, exactly where a habitable zone around another star would be... exactly. Rotation (angle, tilt & speed), moon/no moon play major roles.
Just because we haven't found another habitable planet yet, doesn't mean that it is not, or they are not there.
Marcia
-something tells me that it's been cloudy in Mass. :)