But no matter how differently they feed, all supermassive black holes tend to emit the same radiation, and now a new survey of these galactic gourmands could help explain their outsized influence on their home galaxies.
Until recently, it seemed that a black hole's eating habits determined how much, and in what wavelengths, the area around it should glow. Because the material around the black hole - not the black hole itself - is what emits radiation, the material falling into the black hole in different ways (and in different amounts) should produce different light.
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