Re: "No connection between the two"
Yes I know a physical connection was meant
What's a physical connection when it comes to astronomical objects? Hint: you have 4 forces to choose from of which 2 are available at large scales, gravity and the EM force. Usually, gravity is by far the most important.
Physics: being counterintuitive since De revolutionibus orbium caelestium and getting more so as time goes on.