K2-3b also known as EPIC 201367065 b is an

exoplanet An exoplanet or extrasolar planet is a planet outside the Solar System. The first possible evidence of an exoplanet was noted in 1917 but was not recognized as such. The first confirmation of detection occurred in 1992. A different planet, init ...

orbiting the

red dwarf ''Red Dwarf'' is a British science fiction comedy franchise created by Rob Grant and Doug Naylor, which primarily consists of a television sitcom that aired on BBC Two between 1988 and 1999, and on Dave since 2009, gaining a cult following. T ...

K2-3 every 10 days. It is the largest and most massive planet of the K2-3 system, with about 2.3 times the radius of

Earth Earth is the third planet from the Sun and the only astronomical object known to harbor life. While large volumes of water can be found throughout the Solar System, only Earth sustains liquid surface water. About 71% of Earth's surfa ...

and almost 7 times the mass. Its density of about 3.0 g/cm³ indicates a composition of almost entirely water, or a hydrogen envelope comprising 0.7% of the planet's mass.

References

Exoplanets discovered in 2015 Transiting exoplanets K2-3 3 {{extrasolar-planet-stub Leo (constellation)