Ice-cold Earth? Possible new exoplanet might be chillier than Mars

View larger. | Artist’s concept of HD 137010 b. This candidate exoplanet is rocky and just slightly larger than Earth, with a similar orbit to Earth’s. But it might be colder than Mars, basically an ice-cold Earth. Image via NASA/ JPL-Caltech/ Keith Miller (Caltech/ IPAC).

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• HD 137010 b is a new candidate exoplanet, 146 light-years away. Astronomers found it in data from NASA’s Kepler Space Telescope mission.