English: Hawking and Ellis picture of behavior of light emitted from an event on the symmetry axis of the Goedel lambdadust solution: light spirals outwards, forms a circular cusp (a null curve, but not a null geodesic), then spirals back inwards and reconverges at a later event on the symmetry axis.
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2005-09-09 23:40 Hillman 400×400× (6049 bytes) Hawking and Ellis picture of behavior of light emitted from an event on the symmetry axis of the Goedel lambdadust solution: light spirals outwards, forms a circular cusp (a null curve, but not a null geodesic), then spirals back inwards and reconverges a
{{Information |Description={{en|Hawking and Ellis picture of behavior of light emitted from an event on the symmetry axis of the Goedel lambdadust solution: light spirals outwards, forms a circular cusp (a null curve, but not a null geodesic), then spiral