![]() ![]() ![]() This effect is unique to black holes and does not occur with solid bodies like planets or stars." "Due to the extreme gravitational forces near a black hole, the rotation causes spacetime to become highly curved and twisted, forming what is known as the ergosphere. "While the rotation of a planet or star is governed by the distribution of its mass, the rotation of a black hole is described by its angular momentum," Calmet said. Whereas planets, stars and asteroids are solid bodies with physical surfaces, black holes are actually regions of space-time bounded by an outer nonphysical surface called the event horizon, beyond which no light can escape. A black hole's spin is different from those of other cosmic objects.
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