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A Midnight Sun in Arctic

  1. Oct 11, 2016 #1
    can anyone explain the Midnight Sun occurring in Arctic region. Why it happens and is it possible on a globe? indexas.jpg
  2. jcsd
  3. Oct 11, 2016 #2


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    Staff: Mentor

    It happens because the axis of rotation of the Earth is at an angle (other than 0 or 90 degrees) with respect to the position of the light source.
  4. Oct 11, 2016 #3


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    Science Advisor

    Suppose the Earth's axis of rotation pointed at the sun (Uranus is actually close to this). Do you see then that if you were on the north pole that the sun would be straight overhead and would not move as the Earth rotated? If not, try getting a globe and pointing it at a light bulb. Then tilt the axis away from the light bulb, but still pointed near the sun. Then the sun will describe larger and larger circles around the zenith (the point straight up). This is the situation for the Earth.
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