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A long photographic exposure of the northern sky shows star trails in a circular pattern.  The very center of the circle is(selected ALL of the answers that are correct)Group of answer choicesthe brightest star in the northern hemispherethe position of the north celestial polethe exact position of the North Starthe exact position of Polaristhe exact position of Sirius

Question

A long photographic exposure of the northern sky shows star trails in a circular pattern.  The very center of the circle is(selected ALL of the answers that are correct)Group of answer choicesthe brightest star in the northern hemispherethe position of the north celestial polethe exact position of the North Starthe exact position of Polaristhe exact position of Sirius

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Solution

The correct answers are:

  • the position of the north celestial pole
  • the exact position of the North Star
  • the exact position of Polaris

Explanation:

The North Star, also known as Polaris, is very close to the north celestial pole. This is why all the stars in the northern hemisphere appear to rotate around it. Therefore, a long photographic exposure of the northern sky would show star trails in a circular pattern centered around the North Star/Polaris/north celestial pole.

Sirius is not the correct answer because it is not located near the north celestial pole. It is actually the brightest star in the night sky, but its position changes throughout the night and throughout the year.

The brightest star in the northern hemisphere is not the correct answer because the brightness of a star does not determine its position in the sky.

This problem has been solved

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Which diagram shows the correct position of Polaris in the night sky as seen by an observer at Watertown, NY?

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