What is love...?

https://youtu.be/HEXWRTEbj1I

rat spit - https://thewellnessenterprise.com/emoto/

Do you realize the claims on that site conflict with 200 years of EMPIRICAL chemistry? I'm guessing trolling, or maybe you just don't know any better?

rat spit - Perhaps the claims on the site conflict with Chemistry; but what about Physics?

rat spit - What about the observer effect? The double slit experiment? And the Copenhagen interpretation?

Yes, it violates the fancy quantum stuff quite badly as well.

rat spit - Newton’s formula for the gravitational force exerted on one object by another only works if al the mass is “hypothetically” concentrated at the centre in an infinitesimal point.

That isn't true. What is true, is that more than one arrangement of objects can produce the same physics (the same forces). So if you can find an equivalent arrangement that is easy to do the math with, you might as well just use that instead. And that is what you are discussing, an extremely simple arrangement of objects to make the math easier. It can be done the hard way, hell even I can do it the hard way; but what is the point? You are guaranteed to get the same result as the easy way.

rat spit - I read somewhere that Newton was disturbed by the point mass assumption.

It isn't an assumption. Newton devised an genius proof for it that doesn't even rely on calculus, and he did it with essentially what we'd call highschool geometry. Any math nerd today can prove it with calculus, but at the time calculus was not well known so Newton felt obligated to prove it with a method all his critics would be able to understand (geometry). Newton was hardcore like that.

rat spit - but was Calculus not well known at the time because of the fact that Newton had not yet invented it???

Who invented calculus is in some dispute, but Newton was certainly already using calculus by this time. It is discussed and used in the same paper as the shell theorem. That is why he offered the proof in geometry instead of calculus. He wanted to make sure it didn't look like he was trying to pull a fast one by using this new funky math (calculus) to prove the shell theorem.