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Let us assume that our galaxy consists o...

Let us assume that our galaxy consists of 2.5 `xx 10^(11)` stars each of one solar mass. How long will a star at a distance of 50,000 ly from the galactic centre take to complete one revolution? Take the diameter of the Milky Way to be `10^(5)` ly.

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`3.54 ×x 10^(8)` years.
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