An astronomer observes three large spiral galaxies within a radius of 1 Mpc of each other.This is most likely a galaxy:
A) group.
B) cluster.
C) association.
D) merger.

Question

Quizplus · Accepted Answer

Groups of galaxies are smaller collections typically containing a few to several dozen galaxies within a few million light-years of each other, fitting the description of the observation.

An Astronomer Observes Three Large Spiral Galaxies Within a Radius