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dclayh comments on Rationality quotes: March 2010 - Less Wrong
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As you stand on the equator, with the Sun directly overhead, its gravity is pulling you away from the Earth's center. On the other side of the Earth, the Sun's gravity pulls you in towards its center. Consequently you weigh slightly less at noon than at midnight. However, since the force of the Sun's gravity on a 100-kg mass 1 AU distant is about 0.006 Newton, an average bathroom scale is not going to notice.
I got 0.6N (=6.7e-11 * 2e30 * 100/(1.5e11)^2). Still small, but potentially measurable. (Er, except for the whole frame-of-reference thing mentioned above.)
Oops, added a zero typing the numbers into my calculator. :oo