Image:VanStockum dust inspiral.gif

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VanStockum_dust_inspiral.gif‎ (400 × 400 pixels, file size: 8 KB, MIME type: image/gif)

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[edit] Summary

This figure depicts a thought experiment in the van Stockum dust, an exact solution of the Einstein field equation. The figure shows the world lines of three dust particles, one (green) sitting on the axis of symmetry, and two others (blue), with two sets of red curves depicting null geodesics spiralling inward toward the center at two different events on the green world line. The question is: does the central observer, looking outward (and backward in time) see other dust particles to rotate over time?

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