riVeRraT writes:
Also the name Big Bang does not lend itself to be considered anything but impetus.
Fred Hoyle coined the term Big Bang as an attempt at derision and the name stuck. The term was never meant to be descriptive. The Big Bang was merely the rapid expansion of the universe from an extremely hot dense state.
Just at the moment of the Big Bang the universe was incredibly tiny, hot and dense. All matter and energy of the universe was contained in a space tinier than an atom. And it was contained in that space not by any container, but simply because that's how big space was. There was nowhere else for matter to be but within that tiny, tiny space.
The Big Bang was actually a very rapid expansion of the size of universe. From a size tinier than an atom the universe rapidly expanded, and the contents of the universe expanded with it. There was never any explosive impetus.
I would think it to be logical to assume that there is some force behind the expansion of space,...
There is, just as you say here, a force behind the expansion of space. We call it dark energy, but we don't really know what it is. But the ongoing expansion of space is not the result of space, or of matter either, being blown outward by the Big Bang.
Especially since objects are attracted to each other, something must be driving them apart.
Nothing is driving them apart in the sense of any repulsive force. Again, it is space itself that is expanding, and it is carrying away with it the matter contained therein, except in cases where the matter is sufficiently dense to hold itself together despite the expanding space.
Either way there should be some kind of leading edge (microwave background)...
There is no "leading edge" to the expansion of space. Space is expanding everywhere. The microwave background radiation arrives from all directions simultaneously everywhere throughout the universe.
If all the stars within our dot are moving with us, we can't measure their expansion relative to the rest of the universe.
That's because they're not expanding, but we can measure the speed with which our local group of galaxies is receding from other local groups. We can't directly measure the expansion of space within the local group, but we infer that it is the same here as it is for everywhere else throughout the universe.
--Percy