Question

what is called a group of galaxies​

Answer 1

Explanation:

A galaxy group or group of galaxies (GrG) is an aggregation of galaxies comprising about 50 or fewer gravitationally bound members, each at least as luminous as the Milky Way (about 1010 times the luminosity of the Sun); collections of galaxies larger than groups that are first-order clustering are called galaxy ..

Answer 2

Answer:

cluster

Explanation:

a group of galaxies is known as a galaxy cluster.