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OpenStudy (anonymous):
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 measure the star's blue shift calculate the parallax due to changes in Earth's position calculate the pitch due to changes in frequency of light i beilive its either pitch or red shift
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OpenStudy (shane_b):
The best method would be to measure the star's redshift.
OpenStudy (anonymous):
ok, thanks
OpenStudy (shane_b):
np
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