NASA's Kepler discovers three potentially habitable planets

NASA's Kepler telescope has discovered three "super-Earth-size" exoplanets that are close enough to their stars to make them possibly suitable for water. Two of the planets (Kepler-62e and Kepler-62f) orbit a K2 dwarf estimated to be around 7 billion years old. Measuring at two-thirds the size of our sun, this cosmic lantern is orbited by a total of five planets, three of which are too close to be habitable for life. Kepler-69c, the biggest of this newly discovered trio is estimated to be 70 per...