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 Rho Ophiuchi Molecular Cloud Complex (available here on TL) is a gorgeous and varied target with beautiful nebulae, bright and colorful stars, and some globular clusters thrown in! ...