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Old 01-26-2005, 08:29 PM   #6
Azred
Drow Priestess
 

Join Date: March 13, 2001
Location: a hidden sanctorum high above the metroplex
Age: 47
Posts: 4,031
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Quite right--our seasons are a result of the axis tilt of 23.5 degrees (.41 radians). The axis does precess, so in about 10,000 years the summer months we know now (July, August, etc) will be our winter months then.
All planets have an elliptical orbit, but the eccentricity of the Earth's orbit is very small, making our orbit nearly circular. Kepler proved this centuries ago.
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