Galaxies get up close and personal: Collisions in young galaxy cluster
Wednesday, March 7, 2012 - 12:31
in Astronomy & Space
The Hercules galaxy cluster (also known as Abell 2151) lies about 500 million light-years away in the constellation of Hercules. It is unlike other nearby galactic assemblies in many ways. As well as being rather irregular in shape, it contains a wide variety of galaxy types, particularly young, star-forming spiral galaxies, and there are no giant elliptical galaxies in sight.