How big is the universe today?
- Cite this article as:
- Page, D.N. Gen Relat Gravit (1983) 15: 181. doi:10.1007/BF00762476
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If one defines the size of the present universe in terms of a hypersurface of simultaneity generated by the spatial geodesies orthogonal to our world line today, then it is finite in all expanding Big Bang Friedmann models.