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19 November, 12:25

Why can we not determine distances to galaxies by the same method used to measure the parallaxes of stars?

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  1. 19 November, 12:53
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    Parallaxes can be measured accurately out to distances of approximately 100 light-years. The nearest galaxies are about 50,000 to 80,000 light-years from the Sun. Therefore, there is no perceptible change in the apparent position of any galaxy as we view it from opposite sides of Earth's orbit.
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