Is something eating the universe? (Black holes)
Mysteries of Science
00:00
The Black Hole in the Perseus Galaxy Cluster
The black hole we heard at the very start of the podcast was from the Perseus galaxy cluster. By using special software, scientists could actually take that data and translate it into a note that it makes. And that note is about 57 octaves below middle C. It's such a deep sound that human hearing can't detect it.
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