This is a question I was looking at based on Relativity and John Wheeler's one-electron universe theory. https://en.wikipedia.org/wiki/One-electron_universe My question is this. The faster you move towards the speed of light, wouldn't everything in the universe contract to a single particle or singularity? As you move below the speed of light, wouldn't you see that singular particle from many different perspectives? These different perspectives would be separated by more and more space the slower you move below c. The earth rotates around the sun at 67,000 mph and the speed of light is over 670,000,000 mph which is about .0001 or .01% of the speed of light in mph. So, is there any evidence that an observer on earth and an observer moving at say 80% of the speed of light would measure the size of the universe and get the same size?