PBS Space Time | Do Black Holes Have to Be Black? @pbsspacetime | Uploaded 1 month ago | Updated 2 days ago
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The primary characteristic that defines black holes is in the name. Black holes are black. The gravitational pull at the event horizon is so powerful that not even light can escape. In this case, black means absence of light. We also think of black as indicating absence of colour. But it turns out there is a way to make a coloured black hole—as long as by colour you mean quantum chromodynamic charge.

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