Although most of the planet candidates cataloged by NASA's Kepler space telescope have diameters in the range of 2 to 4 times that of the Earth, little Kepler-138 b is only about the size and mass of ...
So what do we know about it so far? 1. Kepler-452b is the first exo-planet found which is orbiting a similar star to our sun, known as a G2-type star, at a similar distance from its star that Earth is ...
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