Posted: Nov 05, 2016 11:27 pm
newolder wrote:Not a Cavendish test but, nevertheless at test for G variation on the Sun gives:Helioseismology, the analysis of acoustic waves of the sun, has become an interesting area of research. Relevant for gravitation are the constraints on a possible variation of G which reach G ̇/G < 10−12yr−1
It strikes me immediately that this is not a physics experiment. Its observational heliology. A load of assumptions without the ability to control the subject or its environment. It has nothing like the validity of a physics experiment. They really should have sent a Cavendish experiment to the moon.
Nice link, good summary of gravity, and to me it just looks like a big mess based on the great wild assumption that big G measured on Earth is the same everywhere in the universe, and that gravity is independent of other forces.