A few hundred
Galaxy clusters typically have anywhere from 50 to 1,000 galaxies.
Yes its called the Local Cluster or Local Group, we have many minor Globular or Cluster Galaxies orbiting our own.
the Virgo Cluster is a cluster of galaxies at a distance of approximately 59 million light years
the Virgo Cluster is a cluster of galaxies at a distance of approximately 59 million light years
A group of galaxies is called a cluster.
A group of galaxies is called a galaxy cluster or galaxy group.
A collection of galactic groups form a cluster of galaxies. A supercluster is the largest known structure. Galaxies can exist outside of a group or cluster, but the estimated amount is only about 5%. However, there is a possibility that these galaxies may have interacted or merged with other galaxies in the past,
Around 42 named galaxies, with 13 possible additions. See related question.
At the center of a large cluster, you'll usually find large and massive galaxies.
They are simply called "galaxies which are part of a cluster".
A cluster is a collection of galaxies, normally less than about 50 galaxies. All clusters are different and all galaxies are different. A ball point figure would put the maximum number of stars at around 10,000,000,000,000 stars or 10 trillion.
We don't actually know - because we cannot see the universe beyond a certain point due to the fact that we are in it. We have named the cluster of galaxies we are in the Virgo Cluster but there are many other clusters and lone galaxies as well. So we'll probably never know that answer!