Cosmic Microwave Background Radiation: A Homogeneous and Isotropic Universe

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The Cosmic Microwave Background (CMB) radiation is observed to fill the universe in a homogeneous and isotropic manner, with WMAP measurements indicating uniformity within 0.001 percent. This suggests that the CMB plays a significant role in our understanding of the universe's structure. The discussion raises questions about whether this energy radiation adheres to the laws of relativity and if it exerts gravitational force as energy density, characterized by a non-vanishing stress-energy tensor. These considerations are crucial for understanding the implications of the CMB on cosmic evolution and gravitational dynamics. Overall, the CMB is a key component in the study of the universe's properties and behavior.
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does the CMB radiation fill the universe empty space completely homogenously and isotropically?
 
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WMAP says it is pretty homogenis - at least within .001 percent.
 
Chronos said:
WMAP says it is pretty homogenis - at least within .001 percent.

Cool. Does this energy radiation filling the universe follow relativity laws? Or in other words, does it exert gravitational force as energy density with a non-vanishing stress-energy tensor?
 

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