images

Abell 2151 the Hercules cluster

by

Jim Misti/Novapix

Reference

a-amg01-01501

Date

2007-04-30

Abell 2151, the Hercules cluster, is a small, irregular cluster, with a core membership of fewer than 100 galaxies, with none strongly dominant central galaxy. It is more than 360 million light-years away.