Physicist Despairs over Vacuum Energy https://www.youtube.com/watch?v=bl_wGRfbc3w

It is insane to be "very, very confused about what vacuum energy is" and at the same time to be sure that the noise known as CMB (cosmic microwave background) is not a product of this energy but just traverses it, unchanged, and proves the expansion of the universe (disproves the "tired light" hypothesis).

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"If we could see wavelengths way beyond the infrared, all the way to the microwave spectrum, the wall of fire’s spectacle would promptly manifest itself. We know of it (and we have only known of it for less than half a century) because we detect its glow by way of radiation called the cosmic microwave background. [...] To understand the nature of the microwave sky we have to think at almost unimaginable scales of space and time. The snow globe of our universe is so large that the images we glimpse of its outer surface—the microwave light detected by the space probes—took more than 13 billion years to journey from that outer surface to its center." https://blogs.scientificamerican.com/degrees-of-freedom/httpblogsscientificamericancomdegrees-of-freedom20110706under-a-blood-red-sky/

And the microwave light travelled for more than 13 billion years without interacting with anything, not even with vacuum particles? Quite unreasonable:

"Some physicists, however, suggest that there might be one other cosmic factor that could influence the speed of light: quantum vacuum fluctuation. This theory holds that so-called empty spaces in the Universe aren't actually empty - they're teeming with particles that are just constantly changing from existent to non-existent states. Quantum fluctuations, therefore, could slow down the speed of light." https://www.sciencealert.com/how-much-do-we-really-know-about-the-speed-of-light

"As waves travel through a medium, they lose energy over time. This dampening effect would also happen to photons traveling through spacetime, the researchers found." http://www.nature.com/news/superfluid-spacetime-points-to-unification-of-physics-1.15437

The signal called CMB comes from nearby vacuum fluctuations, not from the beginning of the universe.

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