An Earth-like planet more likely to host life if it has a companion planet

August 2, 2014 1:29 AM

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The chance for extraterrestrial life to exist increases on an Earth-like exoplanet with an outer companion planet, study reveals.

Astronomers at the University of Washington (UW) and the University of Arizona have found that for some Earth-like planets, the chance for life to exist there increases when they have an outer companion planet.

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