https://arxiv.org/pdf/1702.04862.pdf

# Einstein Rings aroundn a Black Hole

Steve Trettel

Medium | Custom GPU raytracer for Schwarzschild geometry |
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The Art | The earth-moon system artificially placed in a stable circular orbit around a schwarzschild black hole, to show the phenomena of Einstein rings as an object passes behind a black hole from the perspective of a distant observer. |

The Math | A Schwarzschild black hole is one of the simplest nontrivial solutions to Einstein's general relativity, describing the region of spacetime around a non-rotating, neutrally charged point mass. Raytracing along null geodesics follows the curved trajectories of light through this spacetime, simulating what an observer would see with their eyes. |

Categories | Physics Illustration, Computer Graphics, General Relativity |