Please forgive me, but that isn’t the point. WHat in the wide, wide world of sports is causing them to accelerate? What is feeding energy into the system to cause them to accelerate? If this was just the initial push from the Big Bang, the calcualtions would have already shown it. This is energy being added into the system.
If they’re too dim to see, we don’t know at all what’s out there. For instance, what if, at the time of the Big Bang, there was a large mass of material that “escaped” the gravity of the mass that surrounds us, and is now pulling us out toward them. That would mean they’re accelerating us. That would be slowing them down, while still accelerating us. This would all be happening beyond our ability to see them because they are too far away and too dim to see.