GENERAL KNOWLEDGE

Detailed explanation-1: -It includes living things, planets, stars, galaxies, dust clouds, light, and even time. Before the birth of the Universe, time, space and matter did not exist. The Universe contains billions of galaxies, each containing millions or billions of stars. The space between the stars and galaxies is largely empty.

Detailed explanation-2: -More than two thousand years ago, Plato said, “The universe is a single living creature that embraces all living creatures within it.” However, for the past three hundred years or so, science has viewed the universe as essentially non-living at its foundations and made up of primarily of inert matter and empty space.

Detailed explanation-3: -The universe is a vast expanse of space that contains all of everything in existence. The universe contains all of the galaxies, stars, and planets.

Detailed explanation-4: -Composition. The universe is composed almost completely of dark energy, dark matter, and ordinary matter. Other contents are electromagnetic radiation (estimated to constitute from 0.005% to close to 0.01% of the total mass-energy of the universe) and antimatter.