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

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Universe (economics)
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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 ... 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 ... larger proportion 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 ... of star formation over the lifetime of the universe ...

Famous quotes containing the word universe:

    If we parents accept that problems are an essential part of life’s challenges, rather than reacting to every problem as if something has gone wrong with universe that’s supposed to be perfect, we can demonstrate serenity and confidence in problem solving for our kids....By telling them that we know they have a problem and we know they can solve it, we can pass on a realistic attitude as well as empower our children with self-confidence and a sense of their own worth.
    Barbara Coloroso (20th century)

    How weak and little is the light,
    All the universe of sight,
    Love and delight,
    Before the might,
    If you love it not, of night.
    Edward Thomas (1878–1917)

    The universe is the bride of the soul.
    Ralph Waldo Emerson (1803–1882)