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The Seasons

The Seasons. Tilt of the Earth’s Rotational Axis. Spin Axis – Rotational Axis. Rotational Axis tilted by ~ 23.5 degrees with respect to orbital plane (ECLIPTIC). Tilt is cause of Seasons. Winter in Northern Hemisphere – notice Artic is in complete darkness 66.5 degrees. Seasonal Changes.

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The Seasons

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  1. The Seasons Tilt of the Earth’s Rotational Axis

  2. Spin Axis – Rotational Axis • Rotational Axis tilted by ~ 23.5 degrees with respect to orbital plane (ECLIPTIC)

  3. Tilt is cause of Seasons • Winter in Northern Hemisphere – notice Artic is in complete darkness 66.5 degrees

  4. Seasonal Changes • Not drawn to scale – 66.5 degrees Artic circle or Ant Artic circle

  5. Diurnal Motion from Different Latitudes • North Pole, Equator, Kitt Peak 31 degrees

  6. Diurnal Motion of Sun at different times of the Year from ~40 degrees • Vernal Equinox, Autumnal Equinox, Summer Solstice, Winter Solstice

  7. Summer and Winter • Direct and indirect sunlight

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