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    Space compact?

    So, which mode is currently accepted or is this still undetermined? If the spatial dimensions are compact (closed due to high energy density), wouldn't a non-compact time dimension break the symmetry between space and time? If time can't be compact, would that tend to make you think that space...
  2. T

    Space compact?

    If the universe is filled with matter, and that matter causes space-time to bend, wouldn't the over-all structure be closed? Meaning, if I fly off in some random direction I would eventually "wrap around" the universe like a person moving across the surface of a sphere? If so, is this...
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