The immense Coalsack Nebula is a molecular cloud in the constellation Crux, about 600 light-years away from Earth. Below it in this image is the Dark Doodad Nebula in the constellation Musca. It is about 700 light-years from Earth. Behind it, about 20,000 light-years from Earth, is the globular star cluster NGC 4372.
NGC 5139, or Omega Centauri, is the brightest (as seen from Earth) and largest of about 200 globular star clusters that roam the halo of the Milky Way galaxy. It is 15,000 light years from Earth. Omega Centauri crams about 10 million stars in a diameter of only 150 light years. Globular star clusters are some of the oldest structures known.
Clearly visible in the night skies of the southern hemisphere is the Large Magellanic Cloud. It is the largest satellite dwarf irregular galaxy of our own Milky Way, about 160,000 light-years from Earth and itself spanning 15,000 light-years. It is home to some of the largest star-forming regions in the Local Group of galaxies. The largest such region (left of center) in this image is 30 Doradus - the Tarantula Nebula.