zankaon said:Why isn't our Local Group's dipole for Microwave Background Radiation pointed towards the center of mass for our Local Supercluster? Clusters are suppose to be just infalling towards gravitational well of it's supercluster. http://en.wikipedia.org/wiki/Cosmic_microwave_background"
See anisotropy velocity relative to CMB section.
The Local Group's Microwave Background Radiation dipole is a phenomenon observed in the cosmic microwave background (CMB) radiation, which is the oldest light in the universe. It refers to the apparent motion of the CMB radiation in the sky, which is caused by the movement of our Local Group of galaxies through the universe.
The dipole was first discovered in 1965 by scientists Arno Penzias and Robert Wilson using the Holmdel Horn Antenna in New Jersey. They were studying the CMB radiation and noticed a difference in temperature between opposite directions in the sky, indicating a dipole pattern.
The dipole in the CMB radiation is caused by the Doppler effect, which is the change in the wavelength of light due to the relative motion between the source and the observer. In this case, the dipole is caused by the movement of our Local Group of galaxies through the universe at a speed of about 370 kilometers per second.
The dipole in the CMB radiation tells us that our Local Group of galaxies is not stationary in the universe, but is moving in a particular direction. This movement is relative to the rest of the universe and can give us information about the structure and dynamics of the universe on a larger scale.
The dipole in the CMB radiation needs to be taken into account when studying other aspects of the CMB, such as its anisotropies or small variations in temperature. This is because the dipole can introduce errors in these observations if not properly accounted for. In fact, the dipole must be subtracted from the CMB data in order to obtain a more accurate understanding of the universe's early history.