I've been trying to find out more about cosmic background radiation, but I am unable to find any information on the variations in the measured cosmic background radiation. I'm talking about these WMAP images. Most of the images you'll find on Internet are the versions after being corrected, e.g. http://upload.wikimedia.org/wikipedia/commons/2/2d/WMAP_2010.png But it appears that the actual measurements are closer to this?: 1) First, there appears to be a "dipole" in the measurements. The radiation is a number of microKelvins higher in one part of the sky than in the other. There is a redshift in one part nd a blueshift in the other. What causes this dipole? 2) Then there is this band in the middle which also is quite some microKelvins warmer than the rest. Again, what is the cause of this? 3) Finally, what does the fact that the anisotropies we observe after correcting for the two major shifts imply? That the universe is uniform in every direction? I have little background knowledge of physics or cosmology (I'm a high school student), so I hope I have been able to explain my question clearly enough.