I'm gonna set the reference at the edge of any form of substance, matter/energy/dark matter, whatever, basically this ISN'T a "well the universe has an infinite amount of space and so is infinite" question
it also isn't a globular or any other theorized universe shape, I'm assuming the universal existance (stuff) has been expanding like a blob of dye suddenly appearing underwater (diffusing equally in all directions)
The BBT happened roughly 14.5billion years ago, giving everything a supersonic kick up the backside. now although for some reason I don't fully understand (dark matter I think) we have been steadly moving faster outwards since then
however 'nothing' can go as fast as light, which means the dimensions of the universe should be a rough sphere of LESS than 29Billion lightyears across in any given direction.
is this even remotely correct? if so, why do I see so many bizzare estimates? ranging from only a few billion to a few billion billion to infinite
also vaguely around the same subject, how does intergalactic gravity affect the whole mess? I suppose further away galaxies would pull further behind galaxies faster while further behind galaxies pulled further ones slower, meaning Galaxy A would be in front of Galaxy B, then at some point B would be in front of A, and so on