Your result is only about twice my own napkin math, so it checks out. That formula as written has a typo: to get mass per unit time, multiply (not divide) cross

Your result is only about twice my own napkin math, so it checks out. That formula as written has a typo: to get mass per unit time, multiply (not divide) cross-section-speed by mass density. Other fixes: - solar radius is 7e8 m, not 1.3e9 m - c is 3e8 m/s, not 3e9 m/s I get about 0.5 kg/s https://www.wolframalpha.com/input/?i=%28pi*%287e8m%29%5E2+*+c%29+*+%281e-27+kg%2Fm%5E3%29 https://www.wolframalpha.com/input/?i=%28pi*%287e8m%29%5E2+*...