habitable zone

habitable zone

40 BILLION Earth Size Planets In Habitable Zones In The Milky Way Galaxy Study Finds

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11/05/13 Astronomers at the University of California-Berkeley and the University of Hawaii, using data from NASA's Kepler space telescope, estimate there are tens of billions of Earth-size, possibly habitable planets in our Milky Way galaxy. Given that there just more than 7 billion of us on this planet, that means a planet for each of us with some spares for your picky neighbors. Or a vacation planet or two for you, maybe. And the closest may be circling a star you can see if you look up into the heavens tonight. "When you look up at the thousands of stars in the night sky, the nearest sun-like star with an Earth-size planet in its habitable zone is probably only 12 light years away and can be seen with the naked eye. That is amazing," UC Berkeley graduate student Erik Petigura, the leader of the team that analyzed data from the Kepler, said in a press release.