This Hubble Space Telescope false-color composite image, reveals the orbital motion of the exoplanet Fomalhaut b. Based on these observations, astronomers calculated that the planet is in a 2,000-year-long, highly elliptical orbit. Image © NASA, ESA, and P. Kalas (University of California, Berkeley and SETI Institute)
NASA’s Kepler mission confirmed the discovery of its first rocky planet, named Kepler-10b. Measuring 1.4 times the size of Earth, it is the smallest planet ever discovered outside our solar system.