Suppose an astrophotographer hands you a picture with star trails taken looking toward the north celestial pole. If the star trails are 1/6 of a complete circle, about how many hours was the picture exposed? Hint: How many hours would it take the stars to make a full circle? Report your answer to the nearest whole number

Our answer will be 4 hours.

Explanation:

It takes 24 hours to complete a circle(360° rotation)

Hence to complete 1/6th of complete circle it will take 24/6= 4 hours

Exact in integers= 4 hrs. Hence our answer will be 4 hours.

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