Blog number eighty-seven 12 April 2007
If you drive a car into a fence so that the headlight gets cut straight through by a wire, the cut that is made is a parabola.
The figure that is made by the planets going around the sun describes an ellipse.
Most comets - Haley's Comet, the Hale Bopp Comet that came around in 1997, et al, describe an ellipse around the sun, so they return century after century. The planets describe an ellipse around the sun, as does the moon around the earth.
There are some comets that describe a parabola through the heavens, which means that they have never been here before and they will never return.
So I ask you. Where did they come from and where do they go?
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