The Kepler space telescope already discovered traces of over a thousand possible planets and ten of these concern possible planets similar in size to the Earth with an orbit in the habitable zone of their star. Now confirmation arrived about one of these, called Kepler-22b, distant about six hundred light years from our solar system.

Planetary scientists Guillaume Robuchon and Francis Nimmo of the University of California at Santa Cruz are examining the possibility that Pluto has an underground ocean analyzing the possible signs of its existence. In 2015 the New Horizon space probe should reach Pluto to discover this and other stuff.