Unlike other central galaxies in clusters, this one is bursting with the birth of new stars. (keckobservatory.org)
Which is why astronomers were trying to understand how the massive central galaxy of the Phoenix cluster — a gigantic accumulation of about 1,000 galaxies 5.7 billion light - years away — was producing about 1,000 new stars every year. (ibtimes.com)
A view of the four central galaxies at the heart of cluster Abell 3827, at a broader range of wavelengths, including Hubble Space Telescope imaging in the ultraviolet (shown as blue), and Atacama Large Millimetre Array imaging at very long (sub-mm) wavelengths (shown as red contour lines). (sciencedaily.com)