You are talking about the shape of the cluster though, not the shape of the galaxies within the cluster.
Right. For example, let’s consider the Coma Cluster.
It’s a symmetrical cluster basically spherical in shape, but the individual galaxies within it are elliptical
they’re not spherical or spiral shaped.
But the cluster itself shows spherical symmetry. Um, the Virgo Cluster, on the other hand, is considered irregular.
There’s no symmetry to its overall shape, no central concentration of galaxies,
but it happens to have both elliptical and spiral galaxies within it.
Another question. You were saying how some clusters have more galaxies than others.
How many galaxies does a cluster have to have in order to even be a cluster?