From Wikipedia: "Omega Centauri ( NGC 5139, or Caldwell 80) is a globular cluster in the constellation of Centaurus that was first identified as a non-stellar object by Edmond Halley in...
The Omega Nebula (Messier 17) is a bright nebula in the constellation of Sagittarius. This photo is the result of 3 x 10 minutes frames per each RGB channel and 5 x 10 minutes luminance...