Pegasus is home to a couple of interesting deep sky objects. Messier 15 is a globular star cluster that can be spotted near epsilon Pegasi. The cluster contains a relatively high number of variable stars, at least eight pulsars, and a rare planetary nebula discovered within a globular cluster, named Pease 1. The age of the cluster is estimated to be around 13.2 billion years, making it one of the oldest globular clusters ever discovered. The cluster is approximately 33,600 light-years distant.
The Great Square of Pegasus consists of four stars of nearly equal brightness that make a large square pattern.
The constellation Pegasus represents the white, winged horse of Greek mythology. This beautiful figure can be seen high in the sky starting near the end of summer and continuing through autumn if you live in the Northern Hemisphere. If you are below the Equator, look for Pegasus in late winter and through spring. When looking at the image, it is difficult to see the figure as a horse. That is because the constellation is actually upside-down! Imagine it flipped over, and you can see what could be the neck and head of a horse and two legs sticking out from the famous "Square of Pegasus".
Zeus transformed him into a constellation where we can still see him today. It is said that at that moment, a single feather fell to the earth in the city of Tarus.
Pegasus is often seen represented in ancient works of art and on coins along with Athena and Bellerophon.
Pegasus and Perseus, son of Zeus, became thick friends. Once, when they were galloping over the Mediterranean Sea, they spotted a beautiful maiden chained to a rock to be devoured by a sea serpent. She was Andromeda , the daughter of the Queen of Ethiopia. She told them, her mother had offered her as a sacrifice to the sea queen to protect Ethiopia. Perseus rescued her from the serpent. Later, Perseus and Andromeda were married.
Athena, the Greek goddess, presented Pegasus with a golden bridle, which would help him to fight the evil. She later took him to Jupiter, where he pulled the chariot of Jupiter. Aurora, the goddess of dawn, sometimes rode on Pegasus holding her torch to drive away the night and commence the day.
Tamed by Bellerophon it served as his mount during his adventures including his slaying of the Chimaera. When Bellerophon attempted to fly Pegasus to Mount Olympus he was dismounted by Zeus. Pegasus continued on and made it to Mount Olympus. Here Pegasus spent his days carrying lighting bolts for Zeus.
Parentless, he was raised by the Muses at Mount Helicon, where he was taken by goddess Athena. In all of his excitement for being given to those women, Pegasus was striking the side of the mountain with his hooves and his marks caused springs to turn into flowing fountains of inspiration. Those springs became sacred to the Muses who loved and respected the “flying horse”. But to one of them – Urania, the Muse of Astronomy and Universal Love, Pegasus was particularly important. She saw a heroic future for Pegasus as well as some, possible celestial honor waiting for him. Urania suffered a lot when Bellerophontes, a mythical hero, took Pegasus away.
Medusa was one of the three Gorgons who live on a little island They were winged creatures with writhing snakes in place of hair and golden scales. Anyone who was so unfortunate as to gaze upon her face would be turned to stone. Out of the three only Medusa could be killed for the others were immortal.
PEGASOS (or Pegasus) was an immortal, winged horse which sprang forth from the neck of Medousa when she was beheaded by the hero Perseus.