Kalstang - Me too.<br /><br />Our universe is indeed expanding like a stretching fine gauze with its threads and filaments.<br /><br />Let us assume first that our universe is finite in mass and energy - which many scientists believe, as do I.<br /><br />In that case the gauze is finite, whether we simplify and limit our analysis to 3 dimensions, with time simply passing as cause and effect processes occur (newtonian) - or whethtr we analyze with 4-dimensional space-time and relativistic phenomena factored in (Einsstein).<br /><br />What 3-d shape is this? What 4-d shape is this? Would it be described mathematically as flat or curved, and if so, how curved - enough to curve back on itself?<br /><br />Many scientists subscribe to a flat model alternate to the classic balloon model - in part because of acceleration of expansion - the latter bearing on thread theme since past FTL (faster than light) expansion leaves much of our universe beyond our visibility horizon.<br /><br />But how much, as a ball park estimate in percentage, of our universe lies beyond our visibility horizon?<br /><br />Could it be as high as 90% or even 99%? In the latter case, it would appear that there is no center or edge simply because we are viewing only a very small percentage of the gauze.<br /><br />Here comes another question, which I will immediately post as a new thread (relatively immediately).<br /><br />Ignoring that tangent question for the time being, I will address first edges and then center:<br /><br />EDGES:<br /><br />First, one must define what is meant by edge. Here are a few types of edges:<br /><br />1. The edge of light from our light cone section of our universe from after the inflationary stage when we (due to expansion of space) expanded faster than light. <br /><br />Consider this edge to date from when our section slowed in expansion to ever so slilghtly slower than light speed.<br /><br />How far beyond our visiblity horizon would that edge of lilght reach?<br /><br />2. The edge of gr