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Super-Earth

Though GJ 667Cc (second from left) is the latest addition to a list of life-friendly exoplanets, it’s also the most promising. This planetary lineup depicts the four best bets for exo-incubators so far, compared to Earth and Mars. Numbers beneath the planets rate their score on the Earth Similiarity Index, a metric that considers characteristics such as planetary density and temperature. Credit: Habitable Exoplanets Catalog/UPR Arecibo

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  • Are there parts of our planet that compare with #2 of these earth comparables?
    PedroRoberto PedroRoberto
    Feb. 6, 2012 at 3:02pm
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