The new jet, announced in the journal Nature, has been dubbed "Porphyrion" (a giant in Greek mythology) by its discoverers at the California Institute of Technology in the United States.

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.

The new jet, announced in the journal Nature, has been dubbed “Porphyrion” (a giant in Greek mythology) by its discoverers at the California Institute of Technology in the United States.