Universe

A universe is all matter, energy, and space in a space-time continuum; e.g., the three dimensions of space governed by a fourth dimension of time.
== History and specific ==
Our universe is filled with large clusters of stars and other material, known as galaxies, which are grouped together and held in place by gravity. Other universe may be subjected to different laws of physics and thus, may-or may not-have similar characteristics to our own.
A universe, such as our own, may feature alternate realities, these are generated every time an event generates multiple possible outcomes; each outcome is played out in a different timeline. These timelines collectively make up the entire universe. The terms "alternate universe" or "parallel universe" are sometimes also used to refer to alternate realities, however such usage is inaccurate; a universe is a distinct separate place, divided from other universes by higher dimensions, while an alternate reality is merely a different quantum facet of any one universe, with the same laws of physics, just different histories.
Category:Science