This image contains the first black hole I ever captured.
While black holes appear like stars in visible light due to their bright accretion discs, I decided to do a small edit to make Cygnus X-1 stand out. Just for fun, of course. In visible light I cannot actually “see” the central mass, even though it’s as heavy as 21 suns.
The magnetosphere of the black hole’s accretion disc is so powerful that it creates a “bow shock” arc of plasma seen in blue.