Kepler-20b
Kepler-20b is an exoplanet orbiting Kepler-20. It is classified as a Super-Earth, as it has a radius and mass greater than that of Earth. At about 1.87, it would most likely be a Mini-Neptune, but its high mass of 9.7 implies that it is an iron-rich rocky world. Along with the other four planets in the system, Kepler-20b was announced on 20 December 2011.
