The following consideration is based on a uniform, linear expansion of an explosion.
The conceptual models are reduced to the simplest basis with regard to the physics, and so this consideration assumes that the expansion of the universe is a movement in space, and not an expansion of space.
First of all, this is a poor starting position for the explanation of the phenomenon of accelerated expansion, and yet the solution lies precisely therein.
This can only be understood when one places oneself as an observer on the Earth into a three-dimensional, expanding model, in which one is a rapid component of this expansion. On his voyage he then experiences exactly the same phenomena as Hubble described them ― namely how all distant objects seem to move away from the observer at an accelerated rate.
This voyage is generated in a three-dimensional (3-D) computer simulation. A scale makes this amazing effect comprehensible.