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Physics, 08.10.2021 18:20 pippalotta

6. The red hydrogen line from the nearby star Alpha Centauri is observed to be reduced in wavelength by 0.044 nm — i. e. the line is normally 656.281 nm but it is observed at
656.237 nm — this is equivalent to a change of 0.999933.
(a) Is Alpha Centauri moving toward or away from the Sun?
(b) At what speed is Alpha Centauri moving toward or away from the Sun?

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