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.
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Characteristics
Despite being larger than Neptune
Neptune is the eighth and farthest known planet from the Sun. It is the List of Solar System objects by size, fourth-largest planet in the Solar System by diameter, the third-most-massive planet, and the densest giant planet. It is 17 t ...
, Kepler-87c is only about 6.4 times more massive than Earth. This means that its density is only 0.152 g/cm3. This makes it the first Super-puff, a planet with such 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)