which phrase best defines a galaxy? tightly packed group of older stars large grouping of more than two…
which phrase best defines a galaxy? tightly packed group of older stars large grouping of more than two stars loose, disorganized star cluster held together by gravity large collection of stars, gas, and dust held together by gravity
Answer
Brief Explanations:
A galaxy is a massive, gravitation - bound system that consists of stars, stellar remnants, an interstellar medium of gas and dust, and dark matter. The first three options do not fully capture the composition and nature of a galaxy. The last option correctly describes a galaxy as a large collection of stars, gas, and dust held together by gravity.
Answer:
large collection of stars, gas, and dust held together by gravity