Perhaps, but there is another way of looking at a sphere, in a fractal sense. This idea runs very closely with Zeno's ideas of splitting a distance in half, and in half again, and so on forever. In that way you could view the universe as spherical in shape, and if you were to travel in a straight line you would never, in this way, reach the edge. In that sense it's both bounded and unbounded simultaneously- sort of like how the one can contain the all whilst the all contains the one.
Roger Penrose talks about this in the following video: http://www.youtube.com/watch?v=OutKE3tyG94
I can't remember at what time in the video he mentions this, but it's around the point he begins talking about how the universe may be open, closed, or inversely closed. If you have the time the whole video is worthwhile.. Sorry if this has gotten too far off topic.
L&L ~L
Roger Penrose talks about this in the following video: http://www.youtube.com/watch?v=OutKE3tyG94
I can't remember at what time in the video he mentions this, but it's around the point he begins talking about how the universe may be open, closed, or inversely closed. If you have the time the whole video is worthwhile.. Sorry if this has gotten too far off topic.
L&L ~L