Interpretatio1 - the Sun's motion has been subtracted out leaving fluctuations that are thirty times smaller than the previous map The faint

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Interpretation Below is a sequence of false-color microwave all-sky maps from the Differential Microwave Radiometer (DMR) instrument on the COBE satellite . The galactic equator runs horizontally through the center of each map. The range of temperatures for each map is given in the caption. The colors for the temperatures range from blue for 0 K to red for 4 K (yes, the color scheme is backward---blue should be hot and red should be cool). Notice that the background appears completely uniform at a temperature of 2.728 K. The colors for the temperatures range from blue for 2.724 K to red for 2.732 K. The double-lobe pattern shows the doppler effect from the motion of the Sun with respect to the background radiation. The background appears about 1/1000 times hotter ( redder in this false-color map) in the direction the Sun is moving toward and about 1/1000 times cooler ( bluer here) in the direction the Sun is moving away from.
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The colors for the temperatures range from blue for 2.7279 K to red for 2.7281 K. The effect of
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Unformatted text preview: the Sun's motion has been subtracted out leaving fluctuations that are thirty times smaller than the previous map. The faint microwave contribution of the Milky Way is clearly seen along the center. The Cygnus constellation is at left center, the Sagittarius constellation is at the center, and the Orion constellation is at right center. Below is a picture of the fluctuations in the background radiation when the Milky Way's contribution is subtracted out. It shows a comparison of the coarse resolution of COBE with the finer resolution of the Wilkinson Microwave Anisotropy Probe (WMAP). WMAP has over 30 times greater resolution than the COBE satellite. With that greater resolution WMAP is enabling us to learn the composition, geometry, and history of the universe, amount of matter in the universe, as well as, providing much tighter constraints on the models. Selecting the map will take you to the WMAP homepage in another window....
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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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Interpretatio1 - the Sun's motion has been subtracted out leaving fluctuations that are thirty times smaller than the previous map The faint

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