Question

What is the universe made of?

Answer 1

Astronomers like to call all material made up ofprotons, neutrons and electrons "baryonic matter". Until about thirty years ago, astronomers thought that the universe was composed almost entirely of this "baryonic matter", ordinary atoms.

Answer 2

A galaxy is a huge system of billions of stars, and clouds of dust and gases. There are millions of such galaxies that make a universe.

Hope it helps.....