The Universe consists of everything that physically exists, the totality of space and time and all forms of matter, including all planets, stars, galaxies, intergalactic space components, subatomic particles, and energy.
The term universe may be used in slightly different contextual senses, denoting concepts such as cosmos, the world or nature.
Human galaxy
The observable universe has a radius of about 46 billion years of the Universe luz.A scientific observation led to inferences of its earlier phases. These observations suggest that the universe is governed by the same physical laws and constants throughout most of its extent and history. The Big Bang theory is the prevailing cosmological model that describes the early development of the universe, which is calculated as beginning there 13.798 (± 0.037) billion anos.As observations of supernovae have shown that the universe is expanding at an accelerating rate .