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...
This object was on the title-page of my very first astronomy-book.
I had no idea what I could get out of the CHI-3 telescope of this tiny object - it has only 0.2 arcmin size!
It i...