Does matter exist everywhere, or are there places where there is no matter?
It would seem that there are places far away from stars and galaxies where there are no particles and fields. Or even far beyond our expanding universe. However, light penetrates all corners of the universe. If we see light from distant stars located on the other side of the universe, then this light is visible in any corner of the universe. Light waves pierce through the entire universe. In addition to light waves, there are many other waves: radio waves, X-rays, gamma radiation, gravitational waves, etc. As for the space outside our universe, at least twice the diameter of the universe ( about 30 billion kilometers). light years) in all directions from her, light and other waves also spread out. And possibly much further.So with this space, it would seem clear that there is not the slightest corner where there are no material formations, even in the form of fields. But if the question is put in principle, it is even broader: are there parts of the world much further away in which any matter in any form is completely absent? That is, whether there is a complete void somewhere. Absolute value.