This is a rather bright constellation that is nearly straight overhead at nightfall in November. An imaginary line drawn from Polaris through Cassiopeia to just beyond the zenith brings the viewer to this constellation. The most notable feature of this constellation is not an obvious winged horse, but an asterism known as the Great Square of Pegasus. An inexperienced observer who is accustomed to smaller constellations with denser star groupings might have difficulty perceiving these four widely spaced stars as a square. As the square’s stars are rather bright, and present an almost perfect quadrangle, it tends to be easier to relocate for an observer who has previously spotted this constellation and knows what to expect. The globular star cluster, M15, is the only Messier object in this constellation.
© James R. Johnson, 2014.