Universe, the whole cosmic system of matter and energy of which Earth is a part.
A model or conception of the earth and everything else that exists: "Apart from celestial beings, the aboriginals' universe contained spirits of the land and sea" (Madhusree Mukerjee).
The universe is all the matter, energy, and space that exist. We can observe only a part of it - the observable universe. The entire, universe, including the part we cannot see, may be infinite. Matter is the physical substance of things--of stars, planets, people, and atoms.