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OpenStudy (anonymous):
If star X has a greater blue-shift than star Y, we conclude that star X is Select one: a. moving away from star Y b. moving toward star Y c. moving away from Earth faster than star Y d. moving toward Earth faster than star Y
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OpenStudy (aaronq):
blue shifts occur when the star moves towards earth
OpenStudy (anonymous):
i believe it is d
OpenStudy (aaronq):
the magnitude of the shift indicates the speed
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