G is not a constant. It is entropic acceleration. It is dependent upon the concentration of entropy in that area of space. See:
http://en.wikipedia.org/wiki/Erik_Verlinde Moon gravitational field varies widely, much higher around some craters. Apollo missions had to take into account the varying gravitational acceleration as they orbited the moon else it would throw them off. http://www.nasa.gov/mission_pages/grail/news/grail20121205.html See the ball would not bounce: http://www.youtube.com/watch?v=MY1ITVF6tfc In the end gravity is the collapse of baryonic matter due to dark matter passing though it. Time also collapses on the surface of dark matter. Stewart Darkmattersalot.com On Mon, Dec 17, 2012 at 6:10 PM, Jed Rothwell <jedrothw...@gmail.com> wrote: > I wrote: > > >> His calculation was off by roughly factor of two, but our knowledge of >> the sun's distance has improved immeasurably since then, and we also know >> the mass of the earth more accurately. >> > > I should say we know the gravitational constant G more accurately. > > In the first approximation you ignore the mass of the planet. Strictly > speaking the sun and planets orbit around their common centers of gravity, > which must be very complicated indeed. > > - Jed > >
