Kepler-11g

Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Kepler-11g is an exoplanet discovered in the orbit of the sunlike star Kepler-11 by the Kepler spacecraft, a NASA satellite that is tasked with searching for terrestrial planets. Kepler-11g is the outermost of the six planets orbiting the star. The planet orbits at a distance that is nearly half of the mean distance between the Earth and the Sun. It completes an orbit every 118 days, placing it at a distance that is much further from its host star than the system's inner five planets. It is estimated to have a radius that is four times larger than Earth's, i.e. about Neptune's size. Kepler-11g's distance from the inner planets made its confirmation more difficult than that of the inner planets, as scientists had to work to exhaustively disprove all reasonable alternatives before Kepler-11g could be confirmed. The planet's discovery, along with that of the other Kepler-11 planets, was announced on February 2, 2011. According to NASA, the Kepler-11 planets form the flattest and most compact system yet discovered.