"this planet is right smack in the middle of the habitable zone"

Big news-- or rather, new's that's relatively small in an exciting way! NASA has announced confirmation of Kepler 22b, "the first world smaller than Neptune to be found in middle of its star's habitable zone." Although, the planet's composition is unknown, it is only 2.4 times the size of Earth, and its star is "almost a twin of our sun" according to deputy science team leader Natalie Batalha. National Geographic has more details here.