5 - longer until-June 21, the Sumer Solstice , is the...

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Reason for the Seasons - The seasons are caused by the tilt of the Earth’s Axis - In Summer, the sun’s rays are more direct - The days are also longer - In winter, the days are shorter and the suns light is slanted, and less powerful - The seasons do not occur because the earth gets closer or farther from the sun!!! - A direct beam of light intercepts a smaller area than a glancing beam. - So a direct beam is more intense (“Intensity of sunlight caused by the angular change”) Seasons: Northern Hemisphere - On March 20, the days are as long as the nights and the sun rises due east and sets due west. - March 20 is the Vernal Equinox (spring) (equal night) , the 1 st day of Spring - As the Earth orbits, the Sun appears further and further north and the days get
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Unformatted text preview: longer until-June 21, the Sumer Solstice , is the longest day of the year.-The Sun rises in the Northeast and sets in the Northwest.-The days begins to get shorter Seasons: Northern Hemisphere-On Sept 22, the days and nights are both 12 hours long.-Sept 22 is the Autumnal Equinox , the 1 st day of Fall-The Sun rises Due East & sets Due West-Dec 21, the winter solstice shortest day of the year.-The Sun rises in the Southeast and sets in the Southwest-The days begin to get longer 2 Planes in the Sky: Celestial Equator and Ecliptic Plane-Earths axis not perpendicular to the ecliptic...
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This note was uploaded on 09/24/2011 for the course SCI 115 taught by Professor Mccarthy during the Spring '11 term at S.F. State.

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5 - longer until-June 21, the Sumer Solstice , is the...

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