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Kepler-87c
Kepler-87c is a planet orbiting Kepler-87, a star slightly more massive than the Sun and nearing the end of its main-sequence period. ==Characteristics== Despite being larger than Neptune, Kepler-87c is only about 6.4 times more massive than Earth. This means that its density is only 0.152 g/cm3. This is the first planet with a comparable mass to have such a low density. Its equilibrium temperature is 130 °C.〔( An Independent Planet Search In The Kepler Dataset. II. An extremely low-density super-Earth mass planet around Kepler-87 ): Aviv Ofir, Stefan Dreizler, Mathias Zechmeister, Tim-Oliver Husser〕
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