On 20th December , 2011 , the Kepler team announced the discovery of the first Earth-size exoplanets , Kepler-20e and Kepler-20f , orbiting a Sun-like star , Kepler-20.Planet Gliese 667 Cb ( GJ 667 Cb ) was announced by HARPS on 2009 , together with 29 other planets , while Gliese 667 Cc ( GJ 667 Cc ) was included in a paper published on 21 November 2011 .
The discovery of Planet Gliese 667 Cb became public on October 19 , 2009 .