A __________ is a concentration of billions of stars held together by their mutual gravitation.

Question

Quizplus · Accepted Answer

A galaxy is a massive collection of billions of stars, along with gas and dust, that are held together by their mutual gravitational forces. This includes both spiral and elliptical galaxies, as well as irregularly shaped galaxies, and is the only option presented that accurately describes this phenomenon. Pulsars, quasars, and black holes are all types of astronomical objects that can exist within a galaxy but are not the same as a galaxy itself.

A __________ Is a Concentration of Billions of Stars Held