This is the most famous of the two clusters because it has a compact core of galaxies scattered across two degrees of the sky which makes it a popular target for amateur astronomers. (atlasoftheuniverse.com)
Similarly, no space voyage will ever allow humans to observe the dramatic blue spiral arms and golden cores of galaxies seen in astronomy posters. (discovermagazine.com)
A still - growing core of a galaxy in the early universe may help astronomers understand how massive elliptical galaxies get their start. (sciencenews.org)