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OpenStudy (anonymous):

A student observes a star from two positions of Earth in its orbit, in summer and winter, and measures the change in the position of the star. Which of these can be best calculated by this method?

OpenStudy (shane_b):

With that information you can use trigonometric parallax to calculate the star's distance from the observer. See http://www.astronomynotes.com/starprop/s2.htm

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