The habitable zone, redefined

Astronomers at Penn State have redefined the habitable zone–the range around a star that is not too cold or too hot for liquid water to exist on a planet, making it potentially capable of sustaining life as we know it. Building on the previous definition established by Penn State’s Dr. James Kasting, the Penn State Department of Geosciences team developed an updated model for determining whether planets fall within a star’s habitable zone. And in comparing the new model with the previous model, astronomers found that habitable zones are farther away from the stars than previously thought. Space.com explains:…..

Image credit: Chester Herman

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