I've noticed recently that many posts are veering towards the question of just how much of our total Universe can we observe. So I thought a new thread could address this question. 1) What is the radius of the observable Universe? 2) What are our best guesses as to the radius of the entire Universe? 3) Every year, more and more fringial quasars come into our observable view because their light finally reaches our telescopes. Does the HyperUniverse (the part beyond our observable horizon) expand faster then the rate at which our observable horizon expands? In other words, does the HyperUniverse create more unseen 'objects' every year than our observable Universe shows to us? 4) WMAP suggests the Universe is accelerating in its expansion, at what velocity is this expansion taking place at? 5) If an observer could sit comfortably in a spaceship on the observable Universe's horizon and look outwards at the HyperUniverse, would he continually see new point sources of light 'blip' into existence as the light from 'objects' in the Hypersphere finally reach his eyes? 6) Forgive me if this question is dumb. Would 'objects' in the HyperUniverse gravitationally effect 'objects' just inside our Observable Universe Horizon, or would these gravitational effects simply not occur since they also propogate at C? Thanks. I hope this thread can serve as a rallying point for amateur cosmologists like me to gather expert opinions from PF members like SpaceTiger and others. We love our questions, don't we!