US space agency NASA HAS released new sound emerging from a black hole, the dark cauldron from which nothing comes out.
The American space agency picked up the sound from the black hole at the center of the Perseus galaxy cluster.
While it is known that sound cannot travel in a vacuum, that NASA observatory actually picked up sound, which was then amplified, and mixed with other data, to hear a black hole.
A black hole is formed from the death of a star with such a high gravitational field that the matter gets squeezed into the small space under it, trapping the light of the dead star. Since no light can get out, people can't see black holes. They are invisible.
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