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Gravity

Gravity

Sharp ring of light spotted around supermassive black hole

17 Aug 2022 Hamish Johnston
EHT photon ring
Sharper image: the photon ring surrounding M87* (in orange) shown with the diffuse background light represented by contour lines. (Courtesy: Perimeter Institute for Theoretical Physics)
A sharp ring of light created by photons racing around the back of a supermassive black hole has bee

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Hamish Johnston is an online editor of Physics World
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