TON 618

hyperluminous quasar · one of the most massive black holes known

light left it 10.8 billion years ago · now ~18 billion light-years away

A black hole of about 40 billion Suns powering a quasar 140 trillion times brighter than the Sun. Its event horizon would swallow the Solar System out to 50 times Neptune's distance.

• event horizon ~1,600 AU across; light takes 9 days to cross it
• we see it as it was 10.8 billion years ago

kind

black hole

size

0.025 light-years across (event horizon)