Astronomers have seen the largest jets ever found erupting from a black hole. The giant jet system Porphyrion is 23 million light-years long, equal to 140 side-by-side Milky Way galaxies.
"They need to be sustained by a continued infall of matter into the black hole, something of the order of one solar mass (the mass of the sun) a year of material." Such jets, not visible to the naked ...