I feel a little like the fly.
If space is defined as the region of forces, energy, matter, and time, object traveling faster than the speed of light present two problems. If they emit light, conceptually and visually they disappear before they exist.
Maybe dark energy is the wave that swept all that energy and matter like an afternoon of Australian surfers, faster than light, and is out there at the universal perimeter still expanding.
Maybe dark matter is likewise traveling faster than c, riding the ripples of that wave, assuming like other physical events, more than a single wave came out of the Big Bang. We can't see it because it's ahead of its light, but its presence and existence produces gravity affecting all the energy and matter we can and do see.
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