CoRoT-20b
CoRoT-20b is a transiting exoplanet found by the CoRoT space telescope in 2011.
It is a hot Jupiter-sized planet orbiting CoRoT-20. It is a young planet, with an estimated age between 0.06 and 0.14 Gyr. Its density is remarkably high for its mass, making CoRoT-20b one of the most compact gas giants.