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...
Abell 36 is a planetary nebula located in the constellation of Virgo, about 800 light years away from Earth. It is also known as PN A66 36.
The nebula was discovered in 1955 by the A...