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What Feeds the Beast in a Galaxy Cluster?
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About this work
A massive cluster of galaxies, called SpARCS1049+56, can be seen in this multi-wavelength view from NASA Hubble and Spitzer space telescopes. At the middle of the picture is the largest, central member of the family of galaxies (upper right red dot of central pair). Unlike other central galaxies in clusters, this one is bursting with the birth of new stars. Scientists say this star birth was triggered by a collision between a smaller galaxy and the giant, central galaxy.
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Credit lineWhat Feeds the Beast in a Galaxy Cluster?. NASA/JPL, 2015-09-10. Public domain. ID: PIA19837.