The Universe as a Black Hole

@article{Pathria1972TheUA,
  title={The Universe as a Black Hole},
  author={R. K. Pathria},
  journal={Nature},
  year={1972},
  volume={240},
  pages={298-299}
}
SINCE Einstein applied his general theory of relativity to study the structure of the universe as a whole1, cosmologists have wondered if the universe is geometrically closed or open. Neither theory nor observation has been able to settle this question unambiguously. Several authors have hoped that the universe may after all be a closed, yet unbounded, system. This would solve many problems regarding the nature and origin of the universe, and would fit many of the observations of distant… 
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This paper is reproduced from Publ. Astron. Soc. Pac., Vol. 67, p. 82 - 98 (1955) to celebrate the centenary of the Publications. See also 004.116.