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bbbl67
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I don't mean a black hole, I mean an actual functioning star that is black to our (human) senses. What that would mean is that a star that is so hot, that it produces hardly any radiation in the visible part of the spectrum, nothing lower than ultraviolet. I mean it's possible from the other end of the temperature scale, like brown dwarfs are so cool, that they don't produce anything higher than infrared radiation, so they would look black to us, unless they were reflecting visible light off of a nearby main sequence star. But it's debatable whether brown dwarfs are actual stars.