Does the Universe have an edge, beyond which there is nothing?
Are the galaxies arranged on the surface of a sphere?
Why can't we see the whole universe?
Does the term "universe" refer to space, or to the matter in it, or to both?
Did the Universe expand from a point? If so, doesn't the universe have to have an edge?
Then where did the idea that the universe was once a point come from?
If the universe started out so dense, why didn't it collapse into a black hole?
Why does looking out in space mean looking back in time?
I've heard the expansion of the universe may be speeding up. Is there an "anti-gravity" force?
#Space #Universe #Documentary
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