On December 5, NASA announced that its observatory spacecraft Kepler had discovered its twenty-second planet. This planet, Kepler-22b, is noteworthy for being in orbit in a habitable zone. Kepler-22b is closer to its star than Earth is to the Sun, but Kepler-22b's star is weaker than the Sun. The composition...
(5) Comments | Posted January 23, 2012 | 10:31 AM