The ESO says that the hidden black hole in HR 6819 is one of the very first stellar-mass black holes found that do not interact violently with their immediate environment and, therefore, appear truly black.The ESO says that the hidden black hole in HR 6819 is one of the very first stellar-mass black holes found that do not interact violently with their immediate environment and, therefore, appear truly black.
Hello, my name is Jack Sparrow. I'm a 50 year old self-employed Pirate from the Caribbean.
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