Space is not empty

Space is not empty
What is filling space? According to wikipedia, we have this answer:
Outer space is not completely empty—it is a hard vacuum containing a low density of particles, predominantly a plasma of hydrogen and helium as well as electromagnetic radiation, magnetic fields, neutrinos, dust, and cosmic rays.
Many scientists try to imagine what else is filling space. Quantum physics tells us that:
The Facts: Quantum physicists discovered that physical atoms are made up of vortices of energy that are constantly spinning and vibrating, each one radiating its own unique energy signature. This is also known as “the Vacuum” or “The Zero-Point Field.” the-quantum-vacuum/
Another site on internet says that
This boils down to the idea that the vacuum isn’t really empty. It’s actually churning with smatterings of particles that disappear and reappear at random, creating a fluctuating energy field. Of course, that’s just because Heisenberg says so. We’ve never had actual proof of this so-called energy field. In the 1940s, scientists found indirect evidence of it by examining the radiation emitted by hydrogen atoms and the forces exerted on closely spaced metal plates, but that was it. Then in 2015, a team of German scientists led by Alfred Leitenstorfer announced that they had directly detected that fluctuating energy field by firing a super-short laser pulse into a vacuum and seeing tiny changes in the polarization of the light. Those changes, they said, were caused by the fluctuations in the quantum vacuum. Still, since many things could potentially cause that fluctuation, that result was up for debate. evidence-curiosity/
The answer from Alfred Leitenstorfer is derived from observed facts not from theory.
Another scientist, Hetrz, made a discovery in 1887 when using a spark gap apparatus. Here is the text from
In 1887, Hertz made observations of the photoelectric effect and of the production and reception of electromagnetic waves, which he published in the journal Annalen der Physik. His receiver was a coil with a voltage difference maintained across a spark gap, which would issue a spark in the presence of electromagnetic waves (which were produced by a transmitter spark coil). He placed the apparatus with the receiving spark gap in a darkened box in order to see the spark better and observed instead, that the maximum spark length was less when in the box. Putting a glass panel between the source of the waves and the receiving spark gap also caused a weakening of the spark.
When teaching electrostatics to college students, we observed another interesting fact. A very sensitive detector was placed about 3 meters away. An ebonite rod was rubbed on fur and it acquired millions of electrons. The detector immediately activated a green led. When a plastic rod was rubbed on cloth to lose electrons, the detector activated the red led. In science language, we say that the ebonite rod with a surplus electrons has a negative charge and the plastic rod with a lack of electrons has a positive charge. That means the detector activates the green led for a negative charge and it activates the red led for a positive charge.
We observed more interesting facts. When the negative ebonite rod was move away from the detector, the detector activated a red led as if it senses a positive charge even if the rod was negative. The opposite effect was also recorded: when a positive charged rod was move away from the detector, it activated the green led showing a negative charge even if the rod was positive.
The most interesting fact was that when the negative ebonite rod was move back and forth, the detector followed by activating the red led and the green led alternatively at the same frequency. A fast movement produced a fast change at the detector. Since the detector was about 3 meters away, it was possible to move a neutral object in between the rod and the detector. When the neutral object was directly in line between them, the detector stopped sensing the charged object. It seems that something was leaving the charged rod in every directions and reached the detector but a simple object like a thin book was able to block that. Hertz observed a similar effect when he placed a glass panel between the spark and the receiving coil. The glass blocked some of the emissions from the spark. That fact really shows that there is something real going from the spark to the coil or from the rod to the detector. It cannot be electrons from the charged rod or from the spark because electrons do not travel 3 meters unless the voltage is in the million volts. The rod did not possessed that voltage. What was emitted from the rod?
Some scientists affirm that virtual particles are created all the time in space. Maybe these particles are the one emitted by the electrons. But virtual particles
have the property of returning to nothing in a very short time. Here we have something real leaving the charged rod and going in strait line to the detector. According to Hertz, it should go at the speed of light. In his experiment, he used sparks at different frequencies and the coil was able to detect what was called radio wave at that time. A rod moving back and forth very fast produces the same thing. The frequency is lower than radio waves but it is of the same nature. Those radio waves seem to be simply a series of emissions where the density varies at the same frequency. Light would then be simply a continuous variation of density of these emissions from a charged object. Space is not empty but contains all those frequencies produced by many apparatus that continually emits those same entities in all directions at speed of light. Are these entities the same as the micro quanta mentioned by Maurizio Michelini in his article: A Flux of Micro Quanta Explains Relativistic Mechanics and the Gravitational Interaction by Maurizio Michelini? Are these entities the same as black matter supposed to exists everywhere because they do not emit light so they appear ‘black’ to us?
What are the properties of these entities?