There is no center of the Universe. If the Universe is flat or negatively curved, then it is infinitely large, and if it is positively curved, then the volume is finite, but space is periodic.
Space is intrinsically expanding, and that expansion is accelerating. That's quite different from acceleration in Newtonian physics. The statements I made about acceleration are in the context of Newtonian, pre-Relativistic physics, and are only approximate in a Relativistic framework.
Space is intrinsically expanding, and that expansion is accelerating. That's quite different from acceleration in Newtonian physics. The statements I made about acceleration are in the context of Newtonian, pre-Relativistic physics, and are only approximate in a Relativistic framework.