Janna Levin

Yeah, classic. Sidney was beloved.

Yeah, classic. Sidney was beloved.

Yeah, classic. Sidney was beloved.

Okay.

Okay.

Okay.

Yeah. In a way, people often confuse how they're formed with the concept of the black hole in the first place. So when black holes were first proposed, Einstein was very surprised that such a solution could be found so quickly, but really thought nature would protect us from their formation. Then nature thinks of a way.

Yeah. In a way, people often confuse how they're formed with the concept of the black hole in the first place. So when black holes were first proposed, Einstein was very surprised that such a solution could be found so quickly, but really thought nature would protect us from their formation. Then nature thinks of a way.

Yeah. In a way, people often confuse how they're formed with the concept of the black hole in the first place. So when black holes were first proposed, Einstein was very surprised that such a solution could be found so quickly, but really thought nature would protect us from their formation. Then nature thinks of a way.

Nature thinks of a way to make these crazy objects, which is to kill off a few stars. But then I think that there's a confusion that dead stars, these very, very massive stars that die, are synonymous with the phenomenon of black hole. And it's really not the case. Black holes are more general and more fundamental than just the death state of a star.

Nature thinks of a way to make these crazy objects, which is to kill off a few stars. But then I think that there's a confusion that dead stars, these very, very massive stars that die, are synonymous with the phenomenon of black hole. And it's really not the case. Black holes are more general and more fundamental than just the death state of a star.

Nature thinks of a way to make these crazy objects, which is to kill off a few stars. But then I think that there's a confusion that dead stars, these very, very massive stars that die, are synonymous with the phenomenon of black hole. And it's really not the case. Black holes are more general and more fundamental than just the death state of a star.

But even the history of how people realized that stars could form black holes is quite fascinating because the entire idea really just started as a thought experiment. If you think of, it's 1915, 1916, when Einstein fully describes relativity in a way that's the canonical formulation. It was a lot of changing back and forth before then. And it's World War I, and he gets a message

But even the history of how people realized that stars could form black holes is quite fascinating because the entire idea really just started as a thought experiment. If you think of, it's 1915, 1916, when Einstein fully describes relativity in a way that's the canonical formulation. It was a lot of changing back and forth before then. And it's World War I, and he gets a message

But even the history of how people realized that stars could form black holes is quite fascinating because the entire idea really just started as a thought experiment. If you think of, it's 1915, 1916, when Einstein fully describes relativity in a way that's the canonical formulation. It was a lot of changing back and forth before then. And it's World War I, and he gets a message

From the Eastern Front, from a friend of his, Karl Schorchild, who solved Einstein's equations, you know, between sitting in the trenches and like cannon fire. It was joked that he was calculating ballistic trajectories. He's also perusing the proceedings of the Prussian Academy of Sciences, as you do. Interesting. He was an astronomer who had enlisted in his 40s.

From the Eastern Front, from a friend of his, Karl Schorchild, who solved Einstein's equations, you know, between sitting in the trenches and like cannon fire. It was joked that he was calculating ballistic trajectories. He's also perusing the proceedings of the Prussian Academy of Sciences, as you do. Interesting. He was an astronomer who had enlisted in his 40s.

From the Eastern Front, from a friend of his, Karl Schorchild, who solved Einstein's equations, you know, between sitting in the trenches and like cannon fire. It was joked that he was calculating ballistic trajectories. He's also perusing the proceedings of the Prussian Academy of Sciences, as you do. Interesting. He was an astronomer who had enlisted in his 40s.

And he finds this really remarkable solution to Einstein's equations. And it's the first exact solution. He doesn't call it a black hole. It's not called a black hole for decades. But what I love about what Churchill did is it's a thought experiment. It's not about observations. It's not about making these things in nature. It's really just about the idea.

And he finds this really remarkable solution to Einstein's equations. And it's the first exact solution. He doesn't call it a black hole. It's not called a black hole for decades. But what I love about what Churchill did is it's a thought experiment. It's not about observations. It's not about making these things in nature. It's really just about the idea.