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No light comes from a black hole.

There are occasional bursts of X-rays from the accretion disk AROUND the black hole, we believe, caused as dust and gas are accelerated by gravity to nearly the speed of light. That's what we call the "event horizon"; the point at which falling mass is accelerated to lightspeed. Since the math for matter traveling at lightspeed doesn't make any sense, we say "We CAN'T know what happens".

Eventually, many years from now, we'll be able to examine the area around a black hole, but there are none nearby. EVERYTHING we think we know about black holes is based on mathematical theory, and it is highly probable that much of what we think we know is wrong.

Unfortunately, we don't know which parts.

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14y ago

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