Cosmic crystallography
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Cosmic crystallography is a technique used in physics and astronomy to determine the possible topology of the universe (e.g. a torus, 3-sphere, etc.). Astronomers observe sources of high redshift and look for repeating patterns that may indicate the connection of edges.[1]
Pair separation histograms
Cosmic crystallographers use cosmic separation histograms to infer characteristics of the universe. Large spikes are expected to appear if the universe is not simply connected.
References
- ^ Lehoucq, R.; et al. (September 1996), "Cosmic crystallography", Astronomy and Astrophysics, 313: 339–346, arXiv:gr-qc/9604050, Bibcode:1996A&A...313..339L.
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