Nature Astronomy, Published online: 06 November 2023; doi:10.1038/s41550-023-02111-9

A lensed quasar at redshift z ≈ 10.3, seen in X-rays, hosts a supermassive black hole of mass similar to that of its host galaxy. The large black-hole mass at a young age, as well as the amount of X-rays it produces, suggest that the black hole formed from the collapse of a huge cloud of gas.

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