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M31 Blues
Featured on January 29, 2013
Hubble Space Telescope recently snapped an ultra-sharp view of the nucleus (inset) of M31, the Andromeda galaxy (background). The image shows that the galaxy has a double nucleus surrounded by a cluster of bright blue stars, which are quite young. The cluster spans several light-years and contains hundreds of stars. A similar but smaller cluster has been discovered in the nucleus of our own galaxy, the Milky Way. [NASA/ESA/T. Lauer (NOAO)]
