If an open cluster contains 450 stars and is 21 pc in diameter, what is the average distance between the stars? (Hint: On average, what share of the volume of the cluster surrounds each star? Note: The volume of a sphere is 4 3?r 3.)

If an open cluster contains 450 stars and is 21 pc in diameter, what is the average distance between the stars? (Hint: On average, what share of the volume of the cluster surrounds each star? Note: The volume of a sphere is 4 3?r 3.)

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Question

If an open cluster contains 450 stars and is 21 pc in diameter, what is the average distance between the stars? (Hint: On average, what share of the volume of the cluster surrounds each star? Note: The volume of a sphere is

?r ³.)