With at least a hundred billion galaxies in the observable Universe and two hundred billion stars in Earth’s Milky Way alone, the potential for planets with the conditions to support human-like life is considerate. But there is no solid evidence that such a planet exists.
However, on December 5, 2011, the United States space agency, NASA, announced the Kepler Space Telescope discovery of Kepler-22b, a planet within the right distance of its star for potentially having a habitable temperature. Science bloggers have reacted to the news with analysis and theories of their own.
Diagram comparing Earth’s solar system to an artist’s rendition of Kepler-22b, a star system containing the first “habitable zone” planet discovered by NASA’s Kepler mission. Image credit: NASA/Ames
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