EarthSky reports
How many Earth-sized planets – orbiting in their star’s habitable zone, where liquid water could exist – are out there in our Milky Way galaxy? Scientists have been discovering exoplanets by the thousands in recent years, and now they have a better idea of what the answer to that question is. According to a new study from Penn State University based on data from the Kepler Space Telescope, it turns out that one in four sunlike stars should have at least one planet similar in size to Earth and orbiting in its star’s habitable zone.
Read full article at Wow! What if 1 in 4 sunlike stars has an Earth? | Space | EarthSky
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