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Image 1 & 2 Caption: Computer simulations of what Sagittarius A* (Sgr A*) supermassive black hole might look like when imaged by Event Horizon Telescope (EHT).
Note that EHT is a project to image the event horizons regions of Sgr A* and other SMBHs. It has already imaged M87*, the SMBH at the center of M87, a cD or giant elliptical galaxy (see m87_virgo.html). This image verifies to high probability the existence of event horizons.