VISUAL ARCHIVE / IMAGE STORY
The Light Around TON 618
A luminous quasar makes an unseen central mass part of the observable universe.
Artist’s interpretation of TON 618, a distant quasar powered by an ultramassive black hole. The brilliant structure surrounding the darkness represents matter radiating energy before crossing the event horizon.
THE OBSERVATION
What we can actually see.
Astronomers measure radiation from material around TON 618, then infer properties of its central black hole. The brilliant quasar is observable; the horizon, disk structure, and outflows in this close view have not been resolved as depicted.
THE ILLUSTRATION
What the artwork imagines.
The composition visualizes this idea: A luminous quasar makes an unseen central mass part of the observable universe. Artist’s interpretation of TON 618, a distant quasar powered by an ultramassive black hole. The brilliant structure surrounding the darkness represents matter radiating energy before crossing the event horizon.
FROM THE ILLUSTRATED ARTICLE
The story that inspired it.
The article traces TON 618 from a cataloged blue source to a distant quasar, then asks how spectroscopy and mass calibration change estimates of the enormous central black hole. Its comparisons make the scale vivid while keeping the uncertainty visible. This frame focuses on a luminous quasar makes an unseen central mass part of the observable universe.
Read TON 618: The Black Hole So Enormous That Astronomers Still Disagree About Its SizeCHECK THE RECORD
The image interprets the research below. Follow the original work for the measurements and limits behind the scene.
Research record: doi.org/10.1086/182182 Research record: arxiv.org/abs/astro-ph/0406559 Research record: doi.org/10.3847/1538-3881/ab0956 Research record: www.nasa.gov/universe/nasa-animation-sizes-up-the-universes-biggest-black-holes/ Research record: science.nasa.gov/mission/hubble/science/science-behind-the-discoveries/hubble-quasars/ Research record: science.nasa.gov/mission/webb/science-overview/science-explainers/what-are-active-galactic-nuclei/OTHER IMAGE STORIES
Keep looking.
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Distance Written in Light
The Mark Shared by Titan and PlutoEXPLORE IN 3D / MAP G-01
Compare the darkness near home
The Galactic Center offers a nearby comparison for gravity, orbiting stars, and lensing. Its illustrated black hole is Sagittarius A*, not a reconstruction of the distant quasar TON 618.
Open Sagittarius A* map