High Quality Content by WIKIPEDIA articles! In general relativity, the van Stockum dust is an exact solution of the Einstein field equation in which the gravitational field is generated by dust rotating about an axis of cylindrical symmetry. Since the density of the dust is increasing with distance from this axis, the solution is rather artificial, but as one of the simplest known solutions in general relativity, it stands as a pedagogically important example. This solution is named for Willem Jacob van Stockum, who rediscovered it in 1937, independently of an even earlier discovery by Cornelius Lanczos in 1924.

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