The Omega Nebula (Messier 17) is one of several brilliant deep-sky astrophotography targets located in the constellation Sagittarius. M17 (also known as the Swan Nebula) is an H II region (emission nebula) that lies between 5000-6000 light-years from Earth.  The Omega Nebula is a star factory sculpted by stellar winds and radiation. The cavernous appearance … Continue reading The Omega Nebula