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How do scientists know that the Sun orbits the Milky Way? Is this something more ancient scientists knew or could have known hundreds of years ago?
The stars in our galaxy appear to be redshifted on one side of the center of the milky way, and blue shifted on the other. This would be good evidence that stars in our galaxy orbit the center.
The initial unadjusted data for the CMB looks like a ying-yang. It seems like this would be good evidence that we are orbiting our galaxies center.
How come we can see the doopler effect if we travel at the same angular velocity with the stars of the two sides?