The universe is commonly defined as the totality of existence, including planets, stars, galaxies, the contents of intergalactic space, and all matter and energy. Definitions and usage vary and similar terms include the cosmos, the world and nature.

Scientific observation of earlier stages in the development of the universe, which can be seen at great distances, suggests that the universe has been governed by the same physical laws and constants throughout most of its extent and history. The universe is believed to be at least 93 billion light years in diameter and has existed for about 13.7 billion years, since it was created by the Big Bang.

There are various multiverse hypotheses, in which physicists have suggested that the universe might be one among many universes that likewise exist. The farthest distance that it is theoretically possible for humans to see is described as the observable universe. Observations have shown that the universe appears to be expanding at an accelerating rate, and a number of models have arisen to predict its ultimate fate.

Read more about Universe:  Etymology, Synonyms and Definitions, Size, Age, Contents, Structure, and Laws, Historical Models, Theoretical Models, Shape of The Universe

Other articles related to "universe, universes":

Andromeda - Comics
... Andromeda (Marvel Comics), character native of Atlantis in the Marvel comics universe Andromeda (Pantheon) Laurel Gand codenamed Andromeda, character of the Legion of Super-He ...
Shape of The Universe
... The shape or geometry of the universe includes both local geometry in the observable universe and global geometry, which we may or may not be able to measure ... to the spatial section in comoving coordinates of the four-dimensional space-time of the universe ... If the observable universe is smaller than the entire universe (in some models it is many orders of magnitude smaller), one cannot determine the global ...
Hubble Deep Field - Scientific Results
... As the universe expands, more distant objects recede from the Earth faster, in what is called the Hubble Flow ... of disturbed and irregular galaxies than the local universe galaxy collisions and mergers were more common in the young universe as it was much smaller than today ... to estimate the variation in the rate of star formation over the lifetime of the universe ...
Universe (economics)
... In economics and marketing a universe is a population to be studied or measured ... a population to be measured is described as a "universe", and the measures which are generated are intended to reflect the behavior of that population ... Different statistical surveys may measure related, but different, universes and have to be adjusted to reflect this difference ...
Optimus Prime - Transformers: Universe - Toys
... Universe Spy Changer Optimus Prime with Prowl (2004) The parallel-universe spanning Transformers Universe line also featured a yellow repaint of ...

Famous quotes containing the word universe:

    It is a delicious thing to write, whether well or badly M to be no longer yourself but to move in an entire universe of your own creating.
    Gustave Flaubert (1821–1880)

    There are certain queer times and occasions in this strange mixed affair we call life when a man takes this whole universe for a vast practical joke, though the wit thereof he but dimly discerns, and more than suspects that the joke is at nobody’s expense but his own.
    Herman Melville (1819–1891)

    The universe is then one, infinite, immobile.... It is not capable of comprehension and therefore is endless and limitless, and to that extent infinite and indeterminable, and consequently immobile.
    Giordano Bruno (1548–1600)