A globular cluster is a spherical collection of stars that orbits a galactic core. Globular clusters are very tightly bound by gravity, which gives them their spherical shapes and relatively high stellar densities. M72 is one of well known globular clusters in the constellation Aquarius. It has an apparent visual magnitude of 9.3 and its angular diameter is 5.9 arc-minutes. The image was obtained on 16 November 2010 using a TEC140 f/7 refractor and a SBIG ST-8XE CCD camera with a luminance filter. The total exposure time was 15 minutes, 3-minute subexposures.
