This would also explain the 'flyby anomaly', the apparent acceleration of spacecraft near Earth, for as they neared our planet, the fabric of space in close proximity to Earth became ever-so-slightly stretched...and — to Earthside observers — accelerated more than expected. But as with the Pioneer craft, the spacecraft near Earth did not experience an unusual change in acceleration — instead, they were traveling just as many kilometers per hour as they should, but those kilometers of space were being stretched by their proximity to Earth.
Now here's where things get interesting...because if my "Elastic Space" theory (hereafter referred to as "ES") pans out, then the positions of visible stellar objects are as we see them, and are just as far away as they appear to be...but the light that traveled from those objects had to travel further (to the view of Earthlings in a gravity well) than we had previously understood, because while the light was still traveling at 300,000 kilometers per second, each kilometer was slightly shorter than we expect them to be. In other words, all interstellar light that reaches us here has traveled many more kilometers than we expect...and are significantly more redshifted than they should be.
In 1929, Edwin Hubble proved that the velocity at which various galaxies are receding from the Earth is proportional to their distance from us. The farther away the galaxies are, the more quickly they are accelerating away from us. But ES shows that this is not the case after all, because the more distant the galaxy, the more 'shortened kilometers' the photons from that galaxy has had to traverse, and those photons will be significantly more redshifted than the apparent distance of that galaxy would warrant.
And there's another piece of the puzzle that I alluded to earlier — the observed Pioneer effect was numerically equivalent to the product of the speed of light and the Hubble constant. I think that fact has now become significant.
According to Wikipedia, "dark energy is a hypothetical form of energy that permeates all of space and tends to increase the rate of expansion of the universe. Dark energy is the most popular way to explain recent observations and experiments that the universe appears to be expanding at an accelerating rate...In the standard model of cosmology, dark energy currently accounts for 74% of the total mass-energy of the universe" The major proof of the existence of dark energy is the apparent acceleration of galaxies as evinced by the observed redshift of those galaxies. However, ES shows that the actual redshift of those galaxies is significantly less than the observed redshift.