ChrisW Posted July 31, 2010 Posted July 31, 2010 This picture records the sun's position in the sky, each two weeks at the same time. Is this picture showing the elliptical path of the sun over a period of a year or is this picture decribing some other aspect of the sun's orbit.
ajb Posted July 31, 2010 Posted July 31, 2010 (edited) The seasons are coursed by the Earth's tilt. I think the picture you provide, which is great by the way, provides evidence of this as well as the eccentricity of the Earth's orbit. I am sure you can find out more by doing a quick google. Edited July 31, 2010 by ajb
Janus Posted July 31, 2010 Posted July 31, 2010 It's known as an analemma: http://en.wikipedia.org/wiki/Analemma It is caused by both the eccentricity of the Earth's orbit and the axial tilt of the Earth.
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