- #1
nomadreid
Gold Member
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The fact that gravity takes 8 minutes (or a bit more) to get to the Earth would seem to imply that the perpendicular to the Earth's orbit should be aligned along a line between the Earth and where the sun was eight minutes ago. This would not be a problem if the orbit were perfectly circular and the sun didn't move, but neither of these conditions is true. So why does not the orbit become unstable?