From Angel Chiriboga:

Re:  Stray stars may haunt vastness between galaxies: This information is crucial to understand the mass and light delay between galaxies.

That eerie uneven glow is just the tip of an iceberg.

These stars have been flung out of their orbits for billions and billions of years amongst the hundreds of millions of galaxies since the beginning of time. There should be trillions of dead, dying and brilliantly living stars smeared across the universe, corrupting data based on "empty" space between galaxies.

Light is profusely interactive with any mass.

It's a wonder there are people seeing dark matter, and dark energy everywhere, where there may just be whisks of stellar debris.