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Arp 274 is a system of three galaxies that appears to be partially overlapping, although they may be at somewhat different distances. Two of the three galaxies are forming new stars at a high rate. This is evident in the bright blue knots of star formation along the arms of the galaxy on the right and along the small galaxy on the left. Yellowish older stars can be seen in the central bulge of each galaxy.

CREDIT: NASA, ESA, M. Livio and the Hubble Heritage Team (STScI/AURA).

Source:
http://hubblesite.org/newscenter/archive/releases/2009/14/image/a/