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## Main Question or Discussion Point

So I'm getting somewhat weird numbers when trying to calculate the solar irradiance at each planet. Starting with a baseline of irradiance at Earth of 1376 W/m^2, I use the inverse square law against distance. I find the values for Mercury and Mars are really off, while Venus & Neptune are almost right on the money! What's wrong with my method?

mars average orbital radius - Wolfram|Alpha

solar flux at uranus - Wolfram|Alpha

- Planet: calculated value (W/m
^{2}), actual value (W/m^{2}), percent diff

- Mercury: 9183, 6283, 46.15%

- Venus: 2630, 2600, 1.15%

- Mars: 592.7, 710.6, 19.89%

- Jupiter: 50.82, 47.42, 6.69%

- Saturn: 15.128245, 13.51, 10.70%

- Uranus: 3.736, 3.465, 7.25%

- Neptune: 1.522, 1.526, 0.27%

mars average orbital radius - Wolfram|Alpha

solar flux at uranus - Wolfram|Alpha