The Winged Horse
Pegasus
Brightest star: Enif
Overview
Pegasus is one of the largest constellations in the northern sky, covering about 1,121 square degrees. It is the seventh-largest constellation overall. The Great Square of Pegasus, formed by four stars marking the horse's body, is one of the most recognizable autumn asterisms. Enif (Epsilon Pegasi), the brightest star at magnitude 2.4, marks the horse's nose far from the main body. The constellation is notable for containing 51 Pegasi, the first Sun-like star confirmed to have an exoplanet, discovered in 1995 by Michel Mayor and Didier Queloz. Pegasus is best observed during September through December from the Northern Hemisphere.
Mythology
Pegasus is the famous winged horse of Greek mythology, born from the blood of the Gorgon Medusa when Perseus beheaded her. The white horse with wings sprang from Medusa's neck alongside the warrior Chrysaor. Pegasus was later tamed by the hero Bellerophon with a golden bridle given by the goddess Athena. Together they defeated the Chimera, a fire-breathing monster with a lion's head, goat's body, and serpent's tail. When Bellerophon attempted to ride Pegasus to Mount Olympus, Zeus sent a gadfly that stung the horse, throwing his rider back to Earth. Pegasus continued alone to Olympus, where Zeus employed him to carry thunderbolts.
Astrological Significance
Pegasus carries powerful astrological symbolism related to ambition, aspiration, and the dangers of hubris. The Great Square has been used for centuries as a celestial compass and seasonal marker. In stellar astrology, the star Markab (Alpha Pegasi) carries a Mars-Mercury nature associated with intellectual sharpness and ambition. Scheat (Beta Pegasi) has a Saturn-Mercury nature connected to deep thinking but also potential challenges. The winged horse represents the soul's desire to transcend earthly limitations and reach the divine. Pegasus reminds us that aspiration is noble but must be tempered with humility and respect for natural boundaries.
Observing Tips
Pegasus is best viewed during autumn evenings in the Northern Hemisphere. The Great Square is easy to identify, consisting of Markab, Scheat, Algenib, and Alpheratz (which technically belongs to Andromeda). Inside the Square, count how many stars you can see with the naked eye as a test of sky darkness. The globular cluster M15 is one of the finest in the northern sky, a dense ancient star cluster visible as a fuzzy star in binoculars about four degrees northwest of Enif. The spiral galaxy NGC 7331 and the nearby group known as Stephan's Quintet are popular targets for amateur astrophotographers, lying near the constellation's northern edge.