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...
Messier 17 (M17), also known as the Omega Nebula, Swan Nebula, or Horseshoe Nebula, is a bright emission nebula located in the constellation Sagittarius. It lies about 5,000–6,000 light...