man, after a long time i've got a question! Einstein proved that the universe is expanding but the the galaxies aren't expanding themselves, right? and i've also read an example given by one of the members saying that if u keep 2 or 3 coins on a rubber band and stretch it, the fabric of rubber band between the coins stretchs and the coins move apart but the coins don't stretch themselves. but the coins don't stretch because there is no space in them. they are so closely packed. but if you take a galaxy, there is space between every body. i,e; the space between the earth and mars or the earth and the pole star. so if the fabric of space is expanding, then even the galaxies should stretch right? because the space between each galaxy and between each matter in a galaxy, is the same.