which phrase best defines a galaxy?\n○ tightly packed group of older stars\n○ large grouping of more than…

which phrase best defines a galaxy?\n○ tightly packed group of older stars\n○ large grouping of more than two stars\n○ loose, disorganized star cluster held together by gravity\n○ large collection of stars, gas, and dust held together by gravity

which phrase best defines a galaxy?\n○ tightly packed group of older stars\n○ large grouping of more than two stars\n○ loose, disorganized star cluster held together by gravity\n○ large collection of stars, gas, and dust held together by gravity

Answer

Brief Explanations:

A galaxy is a massive, gravitationally - bound system that consists of stars, gas, and dust. The first three options do not fully capture the composition and nature of a galaxy.

Answer:

large collection of stars, gas, and dust held together by gravity