Seems to me that since the galaxies are moving away at an ever increasing rate that they are not being pushed but pulled. By something as yet unknown. Like barrels approaching a waterfall.
I obviously don't understand much about the physics involved but it just seems to me that the universe is less dense at the edge than at the center. So, as one travels further out, I would assume that the density of dark matter is decreasing and not increasing.
If I toss a ball in the air, the closer it gets to earth the faster it accellerates.
If I hold two magnets together such that they repel each other, the repellant force declines as I move the magnets apart.
Of course, the idea that the outer galaxies are rushing towards something is even more difficult since it implies that there was something already here when the universe showed up and the universe is inside of it.
Sure would be nice if somebody could figure all this stuff out so we could move on to something else
