For the first time, the rotating "donut" of dust and gas around a supermassive black hole has been clearly imaged. This allows astronomers to relate the black hole's rotation loss to the magnetic fields around its jets.

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For the first time, the rotating "donut" of dust and gas around a supermassive black hole has been clearly imaged. This allows astronomers to relate the black hole's rotation loss to the magnetic fields around its jets.