Quote:
Originally Posted by Warren Platts
and then let the planets move in circular orbits, the line would begin to form a spiral, would it not?
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Even if what you propose could otherwise be a meaningful justification of calling the Solar System a spiral, nothing in our solar system is in a circular orbit. Nothing is exactly coplanar, and you really need to take the orbits of the comets into account here. Spiral is definitely not the right term.