Pegasus (constellation)
Pegasus (the winged horse) is a northern constellation, named after the mythological Pegasus. It is one of the 88 modern constellations, and was also one of the 48 constellations listed by Ptolemy. Its three brightest stars together with Alpha Andromedaee form the large asterism known as the Square of Pegasus. A star in this constellation, 51 Pegasi, is orbited by the first true extrasolar planets (planets orbiting a star other than the Sun) to have been discovered.
Neighbouring constellations: Vulpecula - Delphinus - Equuleus - Aquarius - Pisces - Andromeda - Lacerta - Cygnus
