Companion Planet Gives Old World New Chance at Life

August 1, 2014 6:03 PM

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Companionship is apparently something that planets, like people, value in old age. It turns out that a companion planet might be useful in giving an old, less habitable world a new chance at life.

According to the study - published in the journal Monthly Notices of the Royal Astronomical Society - planets cool as they age. Their molten cores solidify and inner heat-generating activity dwindles, causing them to lose their habitability because they can no longer use carbon dioxide to prevent ru...

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