Universe

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":

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 structure by observation one is ...
Hubble Deep Field - Scientific Results
... As the universe expands, more distant objects recede from the Earth faster, in what is called the Hubble Flow ... a considerably larger proportion of disturbed and irregular galaxies than the local universe galaxy collisions and mergers were more common in the young universe as ... to estimate the variation in the rate of star formation over the lifetime of the universe ...
Andromeda - Comics
... character native of Atlantis in the Marvel comics universe Andromeda (Pantheon) Laurel Gand codenamed Andromeda, character of the Legion of Super-Heroes in ...
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 the Spy Changer version of Robots in Disguise Optimus Prime ...
Universe (economics)
... In economics and marketing a universe is a population to be studied or measured ... In economics 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 ...

Famous quotes containing the word universe:

    Whatever universe a professor believes in must at any rate be a universe that lends itself to lengthy discourse. A universe definable in two sentences is something for which the professorial intellect has no use. No faith in anything of that cheap kind!
    William James (1842–1910)

    There are no fixtures in nature. The universe is fluid and volatile. Permanence is but a word of degrees. Our globe seen by God is a transparent law, not a mass of facts. The law dissolves the fact and holds it fluid.
    Ralph Waldo Emerson (1803–1882)

    The illimitable, silent, never-resting thing called Time, rolling, rushing on, swift, silent, like an all-embracing ocean- tide, on which we and all the universe swim like exhalations, like apparitions which are, and then are not: this is forever very literally a miracle; a thing to strike us dumb, for we have no word to speak about it.
    Thomas Carlyle (1795–1881)