• Imaging ever closer to the event horizon

    8 days ago - By Ars Technica

    Enlarge / Artist's conception of a blob of hot matter orbiting close to surface of a black hole. At this distance, its orbit is influenced by the black hole's spin.
    While black holes themselves swallow any light beyond their event horizon, the area outside the event horizon tends to emit lots of light. That's because the material falling in toward the black hole is extremely energetic as it sheds angular momentum and crashes in to other material in orbit around the black hole. So, while we can't image a black hole directly, we can infer some things about its properties using light from...
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