The term “universe” is used to refer to the collection of all things that exist in space.it is made up of billions of stars and planets and enormous clouds of gas separated by a gigantic empty space which is called the universe. it is derived from the Latin word “universum”, which was used by roman statesmen cicero and later Roman authors to refer to the world and the cosmos as they knew it. This consisted of the Earth and all living creatures that dwelt therein, as well the moon, the sun, the then known planets and the stars. The words universe and cosmos are often used interchangeably. The word “cosmos” is derived from the Greek word kosmos, which literally means “the world”. Today, this term is often used refer to all things that exist within the known universe the solar system, the milky way, and all known galaxies and superstructures.in the context of modern science, astronomy and astrophysics, it also refers to all spacetime, all forms of energy and the physical laws that bind them.