The largest known black hole jets, 23 million light years across, have been discovered in the distant universe. This pair of particle beams launched by a supermassive black hole is over a hundred times larger than our galaxy,

Scientists have discovered the longest pair of jets streaming from a black hole in a distant galaxy. Black holes eat most space debris that falls their way.

"If we shrink the jets to the size of the Earth and the black hole accordingly, the black hole would have the size of 0.2 millimeters: the size of an amoeba or a mite on your skin. So these giant jets are incredible: they are as if a single amoeba was able to generate a powerful fountain of energy the size of the entire Earth!"

A Milky Way-sized galaxy from the early universe appears to have stopped producing any new stars because a supermassive black hole at its center is blasting out all the material needed for stars to be forged,

An artist's illustration of the longest black hole jet system ever observed. Nicknamed Porphyrion after a mythological Greek giant, these jets span roughly 7 megaparsecs, or 23 million light- years. That is equivalent to lining up 140 Milky Way galaxies back-to-back. Credit: E. Wernquist / D. Nelson (IllustrisTNG Collaboration) / M. Oei