Extrasolar Planets

This image compares the first Earth-size exoplanets found around a Sun-like star to planets in our own solar system, Earth and Venus. NASA's Kepler mission discovered the newfound planets, called Kepler-20e and Kepler-20f. Kepler-20e is slightly smaller than Venus with a radius .87 times that of Earth. Kepler-20f is a bit larger than Earth at 1.03 times the radius of Earth. The paper presenting the discovery was led by Francois Fressin of Harvard University.

Link to the CfA Exoplanet Resource Center