Gliese 581 d is an unconfirmed exoplanet orbiting a red dwarf Gliese 581. It was discovered in 2007 using the radial velocity method. From 2010 to 2014, it was one of many habitable exoplanets. In 2012, it had an ESI of 0.72, but in 2014, its ESI dropped to 0.53. It has a mass of 6.98 Earths, slightly more massive than GJ 1214 b.

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