September: Pegasus, the horse
Pegasus was the mythical winged horse, ridden by Bellerophon when he slew the fierce Chimera, a fire-breathing monster with a lion's head, a goat's body, and a serpent's tail.
The constellation lies just east of Cygnus and west of Andromeda and it is easily recognized because its three brightest stars, along with Alpha Andromeda lie in the corners of the "Great Square of Pegasus," which is 10 degreees on a side.
The most interesting object in Pegasus is the great globular star cluster M15, which lies near the S-W edge of the constellation, close to Equuleus, the little horse, or colt. FInd this cluster with binocular (a fuzzy patch) then look at it with a telescope.
Learning the constellation Pegasus will be the first step toward locating the Andromeda Galaxy, M31. Next, get out your binoculars and find the star in the N-E corner (Alpha Andromeda). Then step along two stars arcing to the N-E. (There are actually two parallel arcs in this direction. It doesn't make much difference which you follow.) Stop at the second star and then go a short distance to the N-W. There you will find a large oval fuzzy patch with a brighter knot in the center. This is one of our galaxy's nearest neighbors, the Andromeda Galaxy. It contains 200 billion stars, and yhou can imagine someone up there looking back at you.