Questions of Light and Space (Introduction)

by Balance_Maintained , U.S.A., Tuesday, October 12, 2010, 20:18 (5133 days ago) @ David Turell

If space is expanding, and everything is moving away from everything else at an ever increasing speed as described here(Subheading observational evidence), how can Nebula collide?
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> The Milky Way and Andromeda are approaching each other and will meet in 2 billion years. Other collisions of galaxies are seen all the time . It has to do with local movement and gravity. The universe is so vast that there are local events and overall uniform events. Great walls of galaxies and great spaces, but still considered uniform. Nebula is the old word for galaxy.-> > If space is expanding, and everything is moving away from everything else at an ever increasing speed as described here(Subheading observational evidence), how can Nebula collide?
> 
> The Milky Way and Andromeda are approaching each other and will meet in 2 billion years. Other collisions of galaxies are seen all the time . It has to do with local movement and gravity. The universe is so vast that there are local events and overall uniform events. Great walls of galaxies and great spaces, but still considered uniform. Nebula is the old word for galaxy.-
We know that it has happened, and will happen again, the question is why and how. Gravity is a weak force. In fact, it is the weakest of the four fundamental forces. But, are there four fundamental forces, or three? Being that all matter is made up of atoms with positive/negative charges, it is very possible that gravity is a subset of electromagnetism. Einstein died working on that unified theory and many others have tried failed. --
"The gravitational force is extremely weak compared with other fundamental forces. For example, the gravitational force between an electron and proton 1 meter apart is approximately 10^âˆ'67 newtons, while the electromagnetic force between the same two particles is approximately 10^âˆ'28 newtons. Both these forces are weak when compared with the forces we are able to experience directly, but the electromagnetic force in this example is some 39 orders of magnitude (i.e. 1039) greater than the force of gravity — roughly the same ratio as the mass of the Sun compared to a microgram mass."-The point is, gravity could not have done what is being claimed of it, especially with objects moving at exceptionally high rates of speed, with exponentially increasing distance between them. It simply would not have the force to overcome their inertia.