That is called a globular cluster.
A galaxy.
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.
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.
Globular cluster
A globular cluster.
A nebula galaxy does not exist.
An elliptical galaxy is figureless, bright galaxy that is elliptical in shape. A globular cluster is spherical constellation of stars that acts like a satellite orbiting a galaxyâ??s core.
In our Milky Way galaxy, globular clusters tend to be at the "outlying fringes" or "halo" of the galaxy, and seem to be largely made up of very old stars.
Globular Cluster.
Globular Cluster.
Constellation or "asterism". The difference is that "constellations" are officially recognized by the International Astronomical Union, while an "asterism" is any other pattern or grouping of stars.