The Weyl's postulate reference article from the English Wikipedia on 24-Jul-2004 (provided by Fixed Reference: snapshots of Wikipedia from wikipedia.org)

Weyl's postulate

Weyl's postulate states that the world lines of the galaxies form a three-bundle of non-intersecting geodesics orthonormal to a series of space-like hypersurfaces.

It is a fundamental assumption of the Big bang theory. A rough translation is "that a global time and space coordinate system can be defined, where time is, on average, in some sense locally perpendicular to space".

See also

• shape of the universe
• comoving coordinates
• Friedman-Robertson-Walker

External links

• Keel, William C., "Cosmology in the Friedman Universe\". bildad.astr.ua.edu.

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