1.36 understand that

the universe is a large collection of billions of galaxies
a galaxy is a large collection of billions of stars
our solar system is in the Milky Way galaxy.

The Universe is mainly empty space within which are scattered large numbers of galaxies- astronomers believe that there are billions of galaxies in the Universe. The distances between galaxies are millions of times greater than the distances between stars within a galaxy.

Gravitional forces between stars cause them to cluster together in enormous groups called galaxies. Galaxies consist of billions of stars. Our galaxy is called spiral galaxy or the Milky Way and our nearest star is the Sun.