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Last updated on April 24, 2014 at 1:21 EDT
Three-color maps from the WMAP Q V and W-band data
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Three-color maps from the WMAP Q, V and W-band data

April 4, 2003
Map showing an asymmetry (light and dark gray tones), called the "dipole", due to the motion of the spacecraft.The foreground signal of the Milky Way can be separated from the cosmic background because they are different colors.