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    Home»Best of the Web»First rocky planet found outside our solar system

    First rocky planet found outside our solar system

    Best of the Web By Editor16 September 2009
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    There’s finally proof that Earth-like planets can exist outside our solar system. Scientists have managed to measure the mass of exoplanet Corot-7b, revealing that it’s the first exoplanet with a confirmed density similar to our own, Wired News reports.

    The exoplanet Corot-7b is so close to its Sun-like host star that it must experience extreme conditions
    The exoplanet Corot-7b is so close to its Sun-like host star that it must experience extreme conditions

    “This is a day we’ve been waiting for for a long time,” said exoplanet researcher Sara Seager of the Massachusettes Institute of Technology, who was not involved in the research. “It’s the first definitive rocky world beyond our solar system, and it’s opening a new gate for our research. We’re really, really excited about it.”

    When astronomers discovered Corot-7b in February, they couldn’t determine its mass because they didn’t have precise enough measurements of the velocity of its star. Now, using 70 hours of observation data from the High Accuracy Radial velocity Planet Searcher spectrograph, scientists from the European Southern Observatory have calculated that the exoplanet is only about five times more massive than Earth.

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