  The detection and characterization of exoplanets have made huge progresses
since the first discoveries in the late nineties. In particular, the
independent measurement of the mass and radius of planets, by combining the
transit and radial-velociy techniques, allowed exploring their density and
hence, their internal structure. With CoRoT (2007-2012), the pioneering CNES
space-based mission in this investigation, about thirty new planets were
characterized. CoRoT has enhanced the diversity of giant exoplanets and
discovered the first telluric exoplanet. Following CoRoT, the NASA Kepler
mission has extended our knowledge to small-size planets, multiple systems and
planets orbiting binaries. Exploring these new worlds will continue with the
NASA/TESS (2017) and ESA/PLATO (2024) missions.
