Explaining the structure of Galaxy "Filaments" Are galaxy filaments something that could be explained by the Big Bang theory, but NOT the steady state theory? What makes the scale of galaxies so special that the forms which are generated are unlike what happens in nebulas? Is the expansion of the universe the reason for this? Why don't the movements of galaxies resemble the motions of planets in solar systems if they are both caused by the same force? In this video it appears that the filaments themselves may just be illusions: http://www.astro.indiana.edu/animations/b50A.mpg Notice how if you pause the video, every now and then, you can see "structures" shift entirely every time they transition (morph).