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Thank you so much Gwen. I appreciate your kind comments.

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Thank you Debbie. I think it is a fascinating topic too and thank you for the interesting article. I have a lot to learn about this topic but I don’t feel bad, so does the astronomers/astro-physicists themselves.

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https://www.startrek.com/en-ca/news/darkest-treks-closest-calls-with-black-holes

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Yes wormholes such as Einstein–Rosen bridges and Schwarzschild wormholes, also derived from General Theory of Relativity the year after (1916). General Relativity spawned some curious things. Unlike black holes though, none has ever been found.

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And then there are wormholes…

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I did not see that Twilight episode but I saw some other Twilight episodes. A black hole in your closet is certainly an upgrade from a monster in the closet. Black holes has a long history. Already in 1783 John Michell suggested that some stars could have such a strong gravity that light could not escape. He called them dark stars. That is quite different from our modern concept of black holes, but it is still a first step. Then in 1915 Albert Einstein created the General Theory of Relativity, which predicted the existence of real black holes, or the modern concept of black holes bending space and time and an event horizon, etc. At first Albert Einstein did not realize that his theory predicted this. That was Karl Schwarzschild a year later, in 1916. Einstein did not like this and he tried to find a way so that his theory would not predict such monsters. In 1939 Robert Oppenheimer, the father of the atomic bomb, showed that massive stars (at least 3 times more massive than our sun) would collapse into a black hole. In 1971 the first stellar black hole, Cygnus X-1, was discovered. We went from theory to practice. So that is probably what Siri was talking about.

The concept of black holes existed long before 1971 but in 1971 was the first confirmed existence of one. It is often that way. Wolfgang Pauli predicted in 1930 that a particle called the neutrino must exist but no one had seen one. It took until 1956 before the first neutrino was detected.

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