(April 27, 2012 at 9:57 am)Phil Wrote: In case anyone is really interested, the maths that Zen linked to is from a guy named Mike Adams and he claims to be a cell biologist. It doesn't really matter what one is since the math is clear but the problem comes when he doesn't take anything other than his limited knowledge influence him. By limited i am not "dissing" cell biology. I just mean he is ignoring entropy. For two widely separated particles (a high entropy state) he is claiming that they will be attracted into a low entropy state due to gravity. That isn't entirely true though. First off let me say that the reason a high entropy state (particles separated from one another) is much more probable than a low entropy state (particles touching) is simply that there are just many more ways for the particles to be apart than together. Next mistake is his failure to take quantum effects into consideration. Let us for arguments sake claim that the two particles are locked in a course that will cause them to meet when suddenly (as is wont to happen due to quantum fluctuations), a pair of virtual particles forms very close to one of the particles. One or possibly both of the virtual particles "bumps" into the particle and knocks it off of it's collision course. Not too probable but much more probable than what our cell biologist claims. Then there is the natural repulsion of electrons that occurs when electrons get close to one another. Pretty much in an expanding universe none of this will matter anyway since it is mostly a fantasy that two particles would ever meet.
Just to re-iterate what I said earlier, I was speaking of a hy___po__thet___tic___al (now I'm being a smartarse) universe.
If it is empty apart from the two particles in question it won't be expanding will it.
But getting back to my original question which you seem to have forgotten in your quest to be absolutely RIGHT.
When there is nothing in the universe apart from supermassive blackholes and gravity, what then?
If you're not supposed to ride faster than your guardian angel can fly then mine had better get a bloody SR-71.