A supercomputer crunched the data used to make this animation which takes you to the inner zone of the accretion disk of a stellar-mass black hole. Gas is heated to over 10,000,000 °C as it spirals into the black hole glows in low-energy, soft X-rays. As the gas approaches the event horizon, its orbital motion nears the speed of light. Hard X-rays up to hundreds of times more powerful than those in the disk are generated in the corona, a region of tenuous and much hotter gas around the disk. Temperatures in the corona reach billions of degrees.
Video Credit: NASA