I recently came across this really interesting and informative picture, describing the so-called ‘habitable planets’ discovered so far (top 5). Planet habitability is a measure of how suitable a planet (or natural satellite) is for life, under the conditions we know so far.
Click the picture for full size.
I got the pic from Imgur – if anybody else knows the main source, please be kind and share it with us.
Andrei is no scientist, but from an early age, he has been fascinated by science; that's why he went to college, and signed up for Geophysics. Feeling that there's a huge gap between science and average people, he rallied TP, started ZME Science, and gave it a green twist too. 
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Published on Tue, Sep 25, 2012 by Mihai Andrei
Post filled in: Alien life, Space