Ring galaxy AM 0644-741, 2005.
© National Aeronautics & Space Administration / Science & Society
Resembling a diamond-encrusted bracelet, a ring of brilliant blue star clusters wraps around the yellowish nucleus of what was once a normal spiral galaxy in this image from NASA's Hubble Space Telescope (HST). The image was released to commemorate the 14th anniversary of Hubble's launch on 24 April 1990 and its deployment from the space shuttle Discovery on 25 April 1990. The galaxy, catalogued as AM 0644-741, is a member of the class of so-called 'ring galaxies'. It lies 300 million light-years away in the direction of the southern constellation Dorado.