I have not been keeping up on current cosmology theory.(adsbygoogle = window.adsbygoogle || []).push({});

Once was said that if you flew your "Spaceship of the Mind" X billion light years "thataway", and didn't stop or turn, you eventually would find yourself back where you started. The idea here is that 3-dimensional space is actually curved through a 4th dimension so that it wraps upon itself.

Is this still the prevailing notion of modern physics?

In an only loosely-related question: Is this the same curvature of 3D space upon which the eventual Big Crunch depends? i.e. if space is flat, the universe will expand forever. (Ithinkthese two questions are unrelated, despite their overlap of terms.)

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# Curvature of space

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