12. The large collection of stars, dust and gas held together by gravitational attraction between components is known as A.Cluster B.Atmosphere C.Galaxy D.Sun Family
Option C Solution: The term galaxy refers to a large collection of stars, dust, and gas clouds which are held together by gravitational attraction.The smallest galaxies may contain only a few hundred thousand stars, while the largest galaxies have thousands of billions of stars. The Milky Way galaxy contains our solar system.
