By Jeremy Hsu, SPACE.com
Supermassive black holes spin at speeds approaching the speed of light, new research suggests.
Nine huge galaxies were found to contain furiously whirling black holes that pump out energetic jets of gas into the surrounding environment, according to a study using data from NASA's Chandra X-ray Observatory.
How do we really know that a black holes spins at the speed of light?
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We know this because light cannot even escape the pull of an black hole. That it is so massive that nothing, even light can escape the pull of its gravity. That is why we know that they spin that fast.
It is known that light cannot escape black holes thus it has to be spinning faster then the speed of light. It is so massive and spinning so fast in order to keep in light and not let it escape.
We know that it spins at the speed of light because light can not escape it. So it has to be going atleast the speed of light to be catching it and maybe even faster than that.
We can deduce that the speed of the black holes is near the speed of light because the black holes have the ability to keep light within itself. Therefore the black hole has to be spinning that fast to be able to keep light within its grasp.
The gravity within a black hole is so intense that not even light, the fastest object we know of, can escape its force. This shows that black holes must be spinning at the speed of light because light is not able to escape from the black hole. If it were spinning slower, light would be able to escape and we would know that it were spinning slower. However, since light cannot espace we know that black holes are spinning at the speed of light.
A black hole's gravity is so strong that, as the black hole spins, it drags the surrounding space along. The edge of this spinning hole is called the event horizon. Any material crossing the event horizon is pulled into the black hole. It is an object so dense and with gravity so strong that nothing, not even light, can escape its pull if it ventures too close.
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