What is blue shift? Sodium light of wavelength 5890 Å travelling from a galaxy is observed
he 5896 A. What is the speed of the galaxy?
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no one ever knows the speed of galaxy even the scientists don't know
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The displacement of the spectrum to shorter wavelengths in the light comming from distant celestial object moving towards the observer is known as.........
And the speed of the galaxy is 306km/s
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