Valhalla's brilliant free Super Massive is here, but there was *not* yet a demo of the gorgeous new Sirius echo/reverb algorithm. So I made one. And who wants to look at a plug-in UI? So here instead are two visualizations of spiraling supermassive black holes (the real ones). The colored visualization is an aid to understanding gas composition: Gas glows brightly in this computer simulation of supermassive black holes only 40 orbits from merging. Models like this may eventually help scientists pinpoint real examples of these powerful binary systems. Credit: NASA's Goddard Space Flight Center/Scott Noble; simulation data, d'Ascoli et al. 2018 I pan through the 360-video video (the one that has realistic night sky colors) - This 360-degree video places the viewer between two circling supermassive black holes around 18.6 million miles (30 million kilometers) apart with an orbital period of 46 minutes. The simulation shows how the black holes distort the starry background and capture light, producing black hole silhouettes. A distinctive feature called a photon ring outlines the black holes. The entire system would have around 1 million times the Sun’s mass. The background is a view of the entire sky as observed by the NASA's Wide-field Infrared Survey Explorer (WISE). Credit: NASA’s Goddard Space Flight Center/Scott Noble; background, NASA/JPL-Caltech/UCLA Full results of the research at NASA's Scientific Visualization Studio: #section_credits