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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 ...?

Verified Answer :

The best and most correct answer among the choices provided by your question is the first choice or letter A.

The best method to estimate the speed at which a star is moving away from Earth is to measure the star's red shift.

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Answer A. Red shift. verified 12/21/18 per test results.

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