No, it is *very* well defined and *very* well understood. That is how we can be confident that your ravings are wrong.<quoted text>
And of you known physical forces, which is the ONLY one that can cause expansion? EM. However, EM is ill defined and understood.
The cosmological constant is perfectly well able to explain/describe the accelerating expansion. And it isn't like the introduction of a CC is new: it was one of the modifications proposed by Einstein quite early on.
Or nothing at all like that...It is a larger process of motion that has been incorrectly boxed and looked at. Such also make it more difficult to explain those with the rigid views of it they were trained to see.
You had an expansion that created a tension which gave rise to bipolarity on the local level of this universe. This tension is the stretching or displacement of space. Displacement begats motion. Motion bumps heads.
The continued expansion nullifies the present concept of gravity. The expansion is essentially motion begatting motion. Once it starts, it won't stop. If it can't head off in a direction it will be compressed into a spinning sphere.