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Topic: Shape of the universe


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  Kids.net.au - Encyclopedia Universe -   (Site not responding. Last check: 2007-11-06)
In the first half of the 20th century, the word Universe was used to mean the whole spacetime continuum in which we find ourselves, together with all the matter and energy within it.
It is not known whether the Universe is finite or infinite in spatial extent and volume, although the majority of theorists currently favor an infinite Universe.
We live in the centre of the observable universe, in apparent contradiction to the Copernican principle which says that the Universe is more or less uniform and it has no distinguished centre.
www.kidsseek.com /encyclopedia-wiki/un/Universe   (1034 words)

  
 universe: The Size and Shape of the Universe
The first systematic theory of the size and shape of the universe that attempted to explain observed data was constructed by Ptolemy in the 2d cent.
Estimates of the size of the universe have been refined as methods of measuring galactic and extragalactic distances have improved.
Circles in the sky: detecting the shape of the universe.
www.infoplease.com /ce6/sci/A0861715.html   (473 words)

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