At the center of a large cluster, you'll usually find large and massive galaxies.
Nothing special - Just like most large galaxies, they are thought to have a super massive black hole at the centre of the galaxy.
Elliptical galaxies are large blob shaped galaxies that most galaxies will eventually look like. Elliptical galaxies are what happens when two or more large galaxies collide and coalesce.
A globular cluster (without "galaxy") is a large group of stars, in form of a sphere, within a galaxy. A galaxy may have thousands of such clusters. I am not sure whether the term "globular cluster galaxy" has any meaning in astronomy. It might be a galaxy with a lot of such clusters.
When we say "bigger" here, we could be talking about the volume of space the objects take up, or the number of stars involved. In either case, it's tough sledding to make comparisons. In looking at the volume of space taken up by galactic clusters, we see galaxies bigger and smaller than our own Milky Way clustered together. Additionally, we can look at the sum of the volumes of the individual galaxies, or the volume of space that is "under control" of the gravity binding the galaxies in the cluster. In the former case, several tens the volume might be involved. In the latter, 106 to 109 times the volume might be too small as the distances between galaxies, even in a galactic cluster, is enormous. From 3 to 5 times or several tens of times the number of stars could be in a galactic cluster when compared to our Milky Way. We're still finding galactic clusters, and then categorizing them and cataloging them. Making comparisons is still a large challenge.
Billions at least, in the large galaxies. Obviously it depends on the size of the galaxy. It is estimated that in our Galaxy there are at least 100 billion and perhaps as many as 400 billion stars. Many galaxies are same sort of size as ours and some are much bigger. However, there are a lot of small "dwarf galaxies" The smaller dwarf galaxies have millions rather than billions of stars.
B.) A giant elliptical galaxy
In astronomy, a cluster is a large group of celestial bodies such as stars or galaxies.
No, a globular cluster is a group of stars that are part of a galaxy. The Virgo cluster is much bigger. It is a large nearby group of galaxies.
That can be a large globular cluster, or a galaxy. Or any larger structure that includes galaxies.
Not just dwarf galaxies. Giant elliptical galaxies lie likely the result of many galaxies, small and large, merging.
The likely word is the plural "galaxies" (large-scale collections of stars).
a large elliptical galaxy
Nothing special - Just like most large galaxies, they are thought to have a super massive black hole at the centre of the galaxy.
solar systems. ================= A galaxy cluster is a large number of galaxies (more than 50, less than 50 is generally referred to as a galaxy group) with the following characteristics: They contain 50 to 1,000 galaxies, hot X-ray emitting gas and large amounts of dark matter The distribution of the above-mentioned three components is approximately the same in the cluster. They have total masses of 1014 to 1015 solar masses. They typically have a diameter from 2 to 10 Megaparsecs (1 Megaparsec = approximately 3,262,000 light years) The spread of velocities for the individual galaxies is about 800-1000 km/s.
solar systems. ================= A galaxy cluster is a large number of galaxies (more than 50, less than 50 is generally referred to as a galaxy group) with the following characteristics: They contain 50 to 1,000 galaxies, hot X-ray emitting gas and large amounts of dark matter The distribution of the above-mentioned three components is approximately the same in the cluster. They have total masses of 1014 to 1015 solar masses. They typically have a diameter from 2 to 10 Megaparsecs (1 Megaparsec = approximately 3,262,000 light years) The spread of velocities for the individual galaxies is about 800-1000 km/s.
To a large extent, empty space. But there are also isolated stars and other objects, as well as dust and gas. It seems that the intergalactic gas in a galaxy cluster, though thinly spread, has about as much mass as all the galaxies!
a cluster of about 40 galaxies to which the milky way galaxy belongs Five popular Local Group galaxies: 1. Milky Way 2. Andromeda 3. Triangulum 4. Large Magellanic Cloud 5. Small Magellanic Cloud