If a star appears to move back and forth relative to other stars over a six-month period, this motion is due to the star’s: – Q/A (Question and Answer)
Question
                If a star appears to move back and forth relative to other stars over a six-month period, this motion is due to the star’s: – Q/A (Question and Answer)
                  
                Test Answer
Answer:
parallax shift.
Recource Test Questions on Astronomy Chapter 17
                        
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