NGC 1512 is one very hungry galaxy. And, it’s a cannibal. Using CSIRO’s Australia Telescope Compact Array, Spanish and Australian astronomers detected large quantities of cold hydrogen gas extending far from the galaxy’s stellar disc. Infrared and ultraviolet data also indicated that the gas fueling star formation didn’t emanate from the inner regions of the galaxy. Together, these observations led the analysts to conclude that it is likely that, over time, NGC 1512 has feasted on small galaxies in its neighborhood to absorb the gas necessary for star formation. Particularly impressive in this striking image is the 2,400 light-year necklace of star clusters surrounding the galaxy.

Originally from:

http://www.dailygalaxy.com/my_weblog/2015/05/spectacular-galaxy-with-a-2400-light-year-ring-of-star-clusters-observed-devouring-a-dwarf-galaxy.html