Nasa's Kepler mission has been finding new worlds at an incredible rate over the past year - but scientists have been identifying 'exoplanets' for nearly two decades.
Now scientists have started a systematic 'index' to categorise which planets might be 'habitable' - and so far, we've found 47 planets and moons that might fit the bill.
The Habitable Exoplanets Catalogue is the first attempt to categorise which 'exoplanets' and 'exomoons' might be habitable - categorising them by how close they are to their stars, how large they are and what type of planet they are
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From The Urantia Book:
12:1.13 The Grand Universe is the present organized and inhabited creation. It consists of the seven superuniverses, with an aggregate evolutionary potential of around seven trillion inhabited planets, not to mention the eternal spheres of the central creation. But this tentative estimate takes no account of architectural administrative spheres, neither does it include the outlying groups of unorganized universes. The present ragged edge of the grand universe, its uneven and unfinished periphery, together with the tremendously unsettled condition of the whole astronomical plot, suggests to our star students that even the seven superuniverses are, as yet, uncompleted. As we move from within, from the divine center outward in any one direction, we do, eventually, come to the outer limits of the organized and inhabited creation; we come to the outer limits of the grand universe. And it is near this outer border, in a far-off corner of such a magnificent creation, that your local universe has its eventful existence.