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March 28 2013

Earth is closer to the edge of Sun's habitable zone


The Earth could be closer than previously thought to the inner edge of the Sun's habitable zone, according to a new study by planetary scientists in the US and France. The research also suggests that if our planet moved out of the habitable zone, it could lead to a "moist greenhouse" climate that could kick-start further drastic changes to the atmosphere.

A star's habitable zone is the set of orbits within which a planet could have liquid water on its surface and being within this zone is considered to be an important prerequisite for the development of life.

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