All these galaxies belong to the Hercules Cluster, a small, fairly rich galaxy cluster that contains both spiral and elliptical galaxies. Most large galaxies have spiral configurations, a fact that is evident in this image. The most prominent elliptical galaxy here is NGC 6047 (near the bottom); at 1.1 by .89 arc seconds, it is slightly elongated. Use the ΓÇ£hotspotsΓÇ¥ to compare the galaxiesΓÇÖ structures and classifications.
Spiral galaxies are classified ΓÇ£aΓÇ¥ through ΓÇ£d,ΓÇ¥ according to the openness and prominence of their arms. Those with elongated central bulges and barred spirals are classified SB; those with more circular bulges are SA. S0 galaxies have a prominent bulge with a fairly featureless disk that lacks spirals.
