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Mystery of Black Hole Fireworks Solved

Merging black holes

Driven by merging black holes, gas thrown off in galactic jets can reach nearly the speed of light (artist's impression).

Credit: ESA/Hubble, L. Calada (ESO)

Gigantic jets of gas that leap out of galaxies at nearly the speed of light occur only after two galaxies merge, a survey of the distant Universe shows.

From Nature
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