GEOG 1000 Lecture Notes - Lecture 5: Antarctic Circle, Solar Time
1 Oct 2018
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Document Summary
The earth rotates around its polar axis - once every 24 hours. The view from the north pole shows a counter-clockwise rotation and the view from the south pole shows a clockwise rotation. Same point on same meridian results in the same solar time. Sun rises in east and sets in west. Earth revolves around the sun in an elliptical orbit of about 93 million miles from the sun. Earth is closest to the sun (the perihelion) on january 3rd at about 91. 4 million miles. The earth is farthest from the sun (the aphelion) on july 4th at 94. 5 million miles. Earth"s axis is tilted at a 23. 5 degree angle from a vertical line perpendicular to the plane of the ecliptic. 23. 5 degrees n lat is know at the tropic of cancer and 66. 5 degrees n lat is the arctic circle.
