A cosmic lens reveals two feeding black holes just 175 parsecs apart in the early universe

Two supermassive black holes, each feeding, just 175 parsecs — about 570 light-years — apart in a galaxy seen when the universe was barely two billion years old: the most compact confirmed pair known this far back. We can see them only because gravitational lensing turned the sky into a magnifying glass, and MUSE optics and Chandra X-rays confirmed both are active.

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