Kepler-20c is an exoplanet orbiting Kepler-20.
It has a mass similar to Neptune but is slightly smaller.
Despite being the third-closest planet to Kepler-20, it is still close to the star, meaning that it is a hot Neptune.
Along with the other four planets in the system, Kepler-20c was announced on 20 December 2011.
[1] This extrasolar-planet-related article is a stub.