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Ray traced images of Sagittarius A* EHT Collaboration The EHT Collaboration created a flurry of possible images of Sagittarius A* using ray tracing, a technique that predicts who black holes would look like based on Einstein's Theory of General Relativity. The images shown here were created by UArizona's Chi-kwan Chan on CyVerse and Open Science Grid and visualized by University of Illinois' Ben Prather, as part of a larger simulation library assembled by EHT's Theory Working Group.