Off the western side of the constellation Pegasus, three globular star clusters almost line up in a row from north to south in September skies. These globular clusters are, from north to south, M15 in Pegasus, M2 in Aquarius and M30 in Capricorn
See how many of these planetary nebulas you can find in September: the famous Ring Nebula (M57) in the constellation Lyra; the Dumbbell Nebula (M27) in Vulpecula; and the “Blinking Planetary,” NGC 6826 in Cygnus. Not far outside the western boundary of the Summer Triangle is a small, but intensely colorful planetary nebula, NGC 6572.
In early September, lurking low in the northeast sky is another galaxy, separate from our Milky Way – the Great Andromeda Galaxy (M31). From a very dark area without a lot of light pollution, the core of M31 is visible with the unaided eye as a slightly fuzzy spot in the sky.