It's obscured by dust clouds in visible wavelengths, so this was produced by radio telescopes. A whole collection of radio telescopes working as one, collectively called the Event Horizon Telescope.
The center dark hole is the black hole, the bright circle around it is an accretion disk brightly visible in radio wavelengths.
https://eventhorizontelescope.org/blog/a...our-galaxy
(Event Horizon Telescope photo)
The center dark hole is the black hole, the bright circle around it is an accretion disk brightly visible in radio wavelengths.
https://eventhorizontelescope.org/blog/a...our-galaxy
(Event Horizon Telescope photo)