Question

question 1 - 2
which statement best describes a galaxy?
a cloud of gas that is the birth - place of stars
a system of billions of stars, gas, and dust held together by gravity
a ball of plasma that experiences nuclear fusion in its core
a mass of dust and ice that orbits a star in an elliptical pattern

Explanation:

A galaxy is defined as a system consisting of billions of stars, along with gas and dust, all held together by gravitational forces. A cloud of gas that is the birth - place of stars is a nebula. A ball of plasma that experiences nuclear fusion in its core is a star. A mass of dust and ice that orbits a star in an elliptical pattern is a comet or a small body in the solar system.

Answer:

A system of billions of stars, gas, and dust held together by gravity