Saturday, October 9, 2010

Globular Star Cluster NGC 6934

Globular star clusters roam the halo of our Milky Way Galaxy.
Gravitationally bound, these spherical groupings of typically several hundred thousand stars are ancient, older than the stars of the galactic disk. Globular star cluster NGC 6934 itself lies about 50,000 light-years away in the constellation Delphinus. At that distance, this sharp image from Hubble's Advanced Camera for Surveys spans about 50 light-years.(!!!) The cluster stars are estimated to be some 10 billion years old. Beauty.