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
Neptune is the eighth planet from the Sun and the farthest known planet in the Solar System. It is the fourth-largest planet in the Solar System by diameter, the third-most-massive planet, and the densest giant planet. It is 17 times ...
, Kepler-87c is only about 6.4 times more massive than Earth. This means that its density is only 0.152 g/cm
3. This is the first planet with a comparable mass to have such a low density. Its equilibrium temperature is 130 °C.
References
External links
Beyond Earthly Skies - An Extremely Low Density Super-Earth
Exoplanets discovered in 2013
Transiting exoplanets
Exoplanets discovered by the Kepler space telescope
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Cygnus (constellation)