shavedape
Well Known GateFan
http://news.yahoo.com/nasa-telescope-confirms-alien-planet-habitable-zone-162005358.html
Kepler-22b's radius is 2.4 times that of Earth, and the two planets have roughly similar temperatures. If the greenhouse effect operates there similarly to how it does on Earth, the average surface temperature on Kepler-22b would be 72 degrees Fahrenheit (22 degrees Celsius).