Corot-4b (Paperback)

Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. COROT-4b (formerly known as COROT-Exo-4b) is an extrasolar planet orbiting the star COROT-4. It is probably in synchronous orbit with stellar rotation. It was discovered by the French COROT mission in 2008. An extrasolar planet, or exoplanet, is a planet outside the Solar System. As of October 5, 2011, 690 extrasolar planets (in 565 planetary systems and 82 multiple planet systems) have been identified. A substantial fraction of stars have planetary systems - data from the HARPS mission indicates that this includes more than half of all Sun-like stars. Data from the Kepler mission has been used to estimate that there are at least 50 billion planets in our own galaxy. There also exist planetary-mass objects that orbit brown dwarfs and others that orbit the galaxy directly just as stars do, although it is unclear if either type should be labeled as a "planet."