irregular galaxies
They are simply called "galaxies which are part of a cluster".
Elliptical galaxies are sometime called dwarf galaxies.
They are called elliptical galaxies.
A group of galaxies is called a cluster.
They are elliptical galaxies.
You can have dwarf elliptical galaxies.
They are called Spiral Galaxies or Barred Galaxies.
The local group of galaxies that include our Milky Way is called the "Local Group".The local group of galaxies that include our Milky Way is called the "Local Group".The local group of galaxies that include our Milky Way is called the "Local Group".The local group of galaxies that include our Milky Way is called the "Local Group".
That's called a supercluster.
Astronomy
Galaxies that travel together through space are called galaxy groups or galaxy clusters. These are systems of galaxies bound together by gravity.
There are three types of galaxies, all of which are the same, with the exception of their shapes. There are the Elliptical galaxies (football-shaped) the Spiral galaxies (like the Milky way; vortex-shaped) and Irregular galaxies (all shapes other than spiral and football shaped).