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Please help me!!! Explain how astronomers use red shift and blueshift.
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Please help me!!!
Explain how astronomers use red shift and blueshift.

User KTibow
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Astronomers use redshirts to track the rotation of our galaxies, tease out the subtle tug of a distant plant on its parent star, and measure the expansion rate of universe.
User Kiran Bheemarti
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