Bernie, It doesn't matter much how gravity works. It is easily established that it does. How? Simple parallax and positional measurements, together with radial velocities (and in more recent times bouncing radio signals off the planets) have conclusively established how orbital motions and orbits work in the solar system. Case closed. Debate ended. Facts triumph. D.L. Either way "basic physics" not only does not answer the gravitational anomalies but also does not tell you how gravity works at all ( push v pull ). Chalking up everything that does not fit to "anomalies" is hardly scientific evidence for the gravity of "basic physics"...... and if you don't know how gravity works you can't claim "basic physics" and certainly can't claim gravity as a validation for the HC ( heliocentric ) explanation for celestial mechanics when you don't even know what gravity is or how it works... and what's worse just ignore everything that does not fit your ideas and fool oneself into believing it demonstrates ones explanations...???... well sure it does... just ignore everything that does not fit and only focus on and consider the things that do fit. Never mind the fact that one does so only by assumptions... that is not science nor is it basic physics, that is called imagining things! Gravity is the "glue" but if you don't know how the glue works... i.e. push v pull and/or other variables...... to make an appeal to "basic physics" and gravity... is nothing more than a copout, hoping no one will notice! Allen Daves D.L. wrote: Bernie, Mutual attraction between objects and the inverse square law for gravity are easily demonstrated in the lab with a torsion balance. Basic physics would be a plus here. Regards D.L.