Kepler-20b is an exoplanet orbiting Kepler-20 in a system 922 light years from Earth.
[2] It is classified as a Super-Earth, as it has a radius and mass greater than that of Earth.
At about 1.87 R🜨, it would most likely be a Mini-Neptune, but its high mass of 9.7 ME 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.
This extrasolar-planet-related article is a stub.