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The Pleiades is an open cluster consisting of hundreds of stars (7 of which are bright enough to be easily seen with the naked

The Pleiades is an open cluster consisting of hundreds of stars (7 of which are bright enough to be easily seen with the naked eye). The average parallax of the stars in the Pleiades is 7.93 milliarcseconds. (a) How far is the Pleiades? (b) those on the far end, is 0.19 mas. What is the diameter of the cluster in parsecs? The cluster has some diameter. The difference between the parallax of open cluster stars toward us., and

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