Exoplanet types. Artwork of a range of types of extrasolar planets that have been discovered beyond our Solar System. These exoplanets range from very large gas giant planets (largest), to super-Earth (upper left), to gaseous, icy, hot, ringed and rocky planets. As of September 2014, more than 1700 alien planets have been detected, with 452 multi-planet systems, and many thousands more candidates not yet confirmed. Some of these planets may be capable of supporting life.