Pegasus in Myth
The winged horse of the Muses, born of the sea foam and the blood of the slaughtered Medusa. He was caught by Bellerophon, who mounted him and destroyed the Chimera; when Bellerophon attempted to ascend to heaven [Olympus] he was thrown from the horse, and Pegasus mounted alone to the skies to become the constellation of the same name.

When the Muses contended with the daughters of Pieros, Mount Helicon rose heavenward, Pegasus gave it a kick and brought out of the mountain the soul-inspiring waters of the fountain Hippocrene.

from Bulfinch's Mythology