Universe is Uniform on Large Scales

Universe is Uniform on Large Scales - Universe is Uniform...

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Universe is Uniform on Large Scales On size scales of billions of light years, the universe is assumed to be uniform. This makes the universe models simpler and ``more reasonable''---if we lived in an unusual part of the universe, then it would be almost impossible to understand the universe as a whole from observing our surroundings. The discovery of the long superclusters may seem to endanger this assumption. On large enough scales though, the universe has many superclusters in all directions. It is like a large bowl of tapioca pudding, one spoonful of pudding looks like any other spoonful, even though, there are the small tapioca pieces. The idea of a uniform universe is called the cosmological principle . There are two aspects of the cosmological principle: The universe is homogeneous . This means there is no preferred observing position in the universe. The universe is also isotropic . This means you see no difference in the structure of the universe as you look in different directions. The cosmological principle is a Copernican idea. It means we are not in a special place. Every
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This note was uploaded on 12/15/2011 for the course AST AST1002 taught by Professor Emilyhoward during the Fall '10 term at Broward College.

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Universe is Uniform on Large Scales - Universe is Uniform...

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