A vacuum is filled with a whole bunch of particles that are created and destroyed almost instantly, which would seem to me to mean that where there is space, there is matter and energy. So, EITHER the universe does not extend past the asteroids, OR the universe does not have the same physical laws.
In the second case, there is absolutely no way for me to predict what will happen.
In the first option, EITHER there needs to be space through which the asteroids will rotate, OR the fabric of space-time rotates with the asteroids.
This first option would violate the whole “no space beyond asteroids” idea.
With this second option, the setup is EITHER identical to the asteroids not moving at all, OR it is not because the universe is rotating relative to the multiverse.
In the first case, NO.
In the second case, I have no idea.
GQ.