Maybe, the Milky Way is not as typical a galaxy as we thought.

The Milky Way may be in the giant cosmic void. The bubble around the Milky Way can be filled with dark matter. So, there is no radiation resistance. However, the gravitational interaction between the Milky Way and its environment is different from other galaxies. Interactions in the Universe are much more complicated than researchers thought.  

Astronomers think that it's possible. That our home galaxy, Milky Way is in the cosmic void. That means the Milky Way's expansion differs from a typical spiral galaxy. Energy travels out from our galaxy faster than in a typical spiral galaxy. 

Or if we compare energy levels with regular galaxies and galaxies in the cosmic void, the difference between energy levels between the galaxy and its environment is higher if the galaxy is in the cosmic void. Same way less energy travels back to the galaxy because there is less material around it. And that means reflection is lower in the cosmic void. 

That causes differences in interactions between the Milky Way and the space around it if we compare that interaction between typical spiral galaxies and the Milky Way. Otherwise light travels faster around a galaxy in the cosmic void, than around a galaxy that is in a cosmic cloud. So, when photons travel to the wall of that bubble, it slows its speed. Same time. It releases its energy to the cosmic void. When energy jumps back in from the cosmic bubble it travels back to the Milky Way. 

In the Milky Way, the speed of light is slower than in the void. And that releases energy into gas and dust in the Milky Way. This means the Milky Way's energy level is higher if we compare it with regular galaxies. Our galaxy pushes lightweight atoms and ions away from around it. The location in the cosmic bubble can cause the material around our galaxy to be packed differently than around galaxies in regular positions. The material is committed in star clusters. And that means less material reaches the Milky Way. 

"The SAGA Survey’s extensive research across 101 galaxies similar to the Milky Way shows our galaxy may not be as typical as once thought, with significant implications for our understanding of dark matter and galaxy evolution. Credit: Yao-Yuan Mao, with images from the DESI Legacy Surveys Sky Viewer" (ScitechDaily, Unexpected Findings: Scientists Reveal the Milky Way Is a Cosmic Outlier)

So what does that mean? 

We can compare the Milky Way with lonely distant galaxies. Those lonely galaxies expand faster than other galaxies because there is less disturbance around them. But then we must realize, that for expansion galaxy needs material. If the galaxy is in the cosmic void the energy that the galaxy sends and reflects can blow light isotopes from around it. 

And that means there can be mistakes or anomalies in the measurements. If the Milky Way is in a cosmic bubble that can cause an effect there the light or wave movement's wavelength changes when it comes out from the distant objects. The situation in the cosmic voids is that there are no wave fields that can push wave movement back the same way as in space outside those cosmic voids. That means cosmic voids can stretch wave movement. 

The gravity turns opposite when the energy level around the gravity wave turns lower than the gravity wave's bottom. 

And that can cause a situation. Where wave movement's spectral lines move to the right. That effect is seen similar way as the Doppler effect or redshift. So that means the object seems to be at a longer distance than it is. And because wave movement stretches that is seen as stronger redshift than it is. 

But if we think that the cosmic models are breaking because of those cosmic voids or vacuums we must realize the reason for that is that the extremely low energy area can turn gravity wave opposite. A gravity wave is the ditch in the energy field. There is an energy bottom and an energy top. 

If the environment of the gravity wave turns at a lower energy level than the bottom of the gravity wave or gravity ditch. That turns the gravity wave opposite. The pushing gravity waves form when the gravity wave's environment's energy level is lower than the gravity wave's bottom. And that thing is a very important thing when we make cosmological models. 

https://bigthink.com/starts-with-a-bang/tiniest-isolated-galaxy-grow/

https://scitechdaily.com/unexpected-findings-scientists-reveal-the-milky-way-is-a-cosmic-outlier/