- Jan 3, 2012
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Now to change the subject (hopefully), I was laying in my bed last night wondering why we have seasons? I would think the rotation of the Earth would be perpendicular to the Sun's gravitational pull and not at an angle. After all these years it would be forced to? I recently read a while back that the Earth's poles shifted about the time a major asteroid hit and caused an ice age about 20 millenniums ago...
My rudimentary understanding of physics says that the Sun's gravity has the same effect on Earth's orbit whether Earth is tilted or not.