Universe
Totality consisting of space, time, matter and energy
The universe comprises all of existence: all forms of matter and energy, and the structures they form, from sub-atomic particles to entire galactic filaments. Since the early 20th century, the field of cosmology has established that the universe has been expanding for 13.8 billion years, starting from a dense fireball in an event called the Big Bang. The observable portion of the universe is approximately 93 billion light-years in diameter at present. The total size of the universe is not known.
Also known as...
macrocosm, the universe, the cosmos, our universe, cosmos, yin and yang, world, space, outer space, metagalaxy, heaven and earth, existence, everything, all, system, and creation