There's a difference between "complex" and "has no closed-form solution". It's actually a very simple calculation. But fwiw, a lot of thought and tests have g

There's a difference between "complex" and "has no closed-form solution". It's actually a very simple calculation. But fwiw, a lot of thought and tests have gone into showing that gravity works the same way with feather and bowling balls. With big masses and many little ones. If you have a reason to think it doesn't, discuss it and propose tests...