TON 618: il buco nero più grande dell’universo in una ricostruzione della NASA. (Credit photo: NASA-NASA’s Scientific Visualization Studio – Krystofer Kim, Jeremy Schnittman, Francis Reddy, Jeremy Schnittman, Scott Wiessinger, Sophia Roberts “https://upload.wikimedia.org/wikipedia/commons/a/a5/NASA_Animation_Sizes_Up_the_Universe%E2%80%99s_Biggest_Black_Holes_%28SVS14335_-_SMBH_Scale_Still_1%29.jpg”, ritagliata, ridimensionata, dimensioni: 800×700 px., public domain “https://creativecommons.org/publicdomain/zero/1.0/”).