Physics, 15.10.2019 06:30, denareena97

Which of these is the best method to estimate the speed at which a star is moving away from earth?

measure the star's red shift

calculate the pitch due to changes in frequency of light

calculate the parallax due to changes in earth's position

measure the star's blue shift

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Which of these is the best method to estimate the speed at which a star is moving away from earth? <...