另一個地球?The discovery was announced December 5 2011.
2011年12月5日 宣布這一發現
Kepler-22b is the first extrasolar planet
confirmed by NASA's Kepler Space Telescope
to orbit in the habitable zone of a Sun-like star.
開普勒- 22B是"美國國家航空航天局" 的開普勒太空望遠鏡
確認的第一顆類似太陽恆星可居住的太陽系外行星。
The planet's radius is roughly 2.4 times the radius of Earth;
it is 600 light years away from Earth, in orbit around the G-type star Kepler 22
半徑大約是地球半徑的2.4倍，
它圍繞 G型恆星開普勒22的軌道 距離地球600光年。
22° C
If the greenhouse effect caused by the atmosphere is Earthlike,
this corresponds to approximately 22 °C (72°F) average surface temperature
如果大氣所造成的溫室效應是類似地球的，
這相當於約 22° C（72 ° F）的平均表面溫度。
