Maybe I should ask about the moon too but once I get the sun down, maybe I can do the moon myself. I think the best indicator of my weight change is the tide. So the moon has a greater effect. Still the sun has some effect as we get closer and farther. I know that the centrifugal force of our orbit is in balance with the sun’s pull. So there should be 2 solar high tides a day. And that’s why I’m comparing noon to dawn. I’m sure I’m doing this wrong but here it goes. I started with F = G * Mme * Msun / R^2. Since I’m comparing noon to dawn, most of that cancels out to give me Fdelta = Rdawn^2 / Rnoon^2. Sticking to meters (SI units), I get: 149,600,000,000^2 / (149,600,000,000 - 6,378,000)^2 = 1.00008527 I assume this change in force matches my change in weight. So if I way 200lbs, my weight changes by 3oz. That sounds like too much. Where did I go wrong? Is it that assumption?