My work can help determine the composition of a planet from mass and radius measurements that will be available with Kepler and HARPS-NEF. This is the first step towards really characterizing these planets. In particular, if the radius lies above the Terrestrial Threshold radius (maximum radius for a rocky planet), the planet is necessarily 'ocean-like'.
How similar to Earth can super-Earths be? |

GJ 876d - first super-Earth
impression by Lynette Cook, used with permission |