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...
RCW 27 is located in the same direction as the Puppis R2 reflection nebula association in the molecular crest of Vela. One of the main contributors to the ionization of RCW 27 comes fro...