Everything that exists forms a part of the Universe. The Universe comprises of planets, stars, heavenly bodies, galaxies and the energy. The terms cosmos and Universe can be replaced with each other. Cosmos means anything which is maintained in an orderly system. The best known scientific theory of creation is the Big Bang which said that origin of the Universe was from a hot and dense phase where concentration of matter and energy was seen. These are some well known facts about the Universe but to get some famous cosmos and universe quotations and sayings, read on.