Janna Levin

Yeah. So if I were falling into a black hole and I tried really fast, right as I crossed this empty region, but this demarcation, I happened to know where it was. I calculated because there's no line there. There's no sign that it's there. There's no signpost. I could... emit a little light pulse and try to send it outward exactly at the event horizon. So it's racing outward at the speed of light.

Yeah. So if I were falling into a black hole and I tried really fast, right as I crossed this empty region, but this demarcation, I happened to know where it was. I calculated because there's no line there. There's no sign that it's there. There's no signpost. I could... emit a little light pulse and try to send it outward exactly at the event horizon. So it's racing outward at the speed of light.

Yeah. So if I were falling into a black hole and I tried really fast, right as I crossed this empty region, but this demarcation, I happened to know where it was. I calculated because there's no line there. There's no sign that it's there. There's no signpost. I could... emit a little light pulse and try to send it outward exactly at the event horizon. So it's racing outward at the speed of light.

It can hover there because from my perspective, it's very strange. The space-time is like a waterfall raining in, and I'm being dragged in with that waterfall. I can't stop at the event horizon. It comes, it goes. It's behind me really quickly. That light beam can try to sit there because it's like a fish swimming against the Niagara, you know, swimming against a waterfall.

It can hover there because from my perspective, it's very strange. The space-time is like a waterfall raining in, and I'm being dragged in with that waterfall. I can't stop at the event horizon. It comes, it goes. It's behind me really quickly. That light beam can try to sit there because it's like a fish swimming against the Niagara, you know, swimming against a waterfall.

It can hover there because from my perspective, it's very strange. The space-time is like a waterfall raining in, and I'm being dragged in with that waterfall. I can't stop at the event horizon. It comes, it goes. It's behind me really quickly. That light beam can try to sit there because it's like a fish swimming against the Niagara, you know, swimming against a waterfall.

But it's like stuck there. And so that's one way you can have a little signpost. You know, if you fly by, you think it's moving at the speed of light. It flies past you at the speed of light, but it's sitting right there at the event horizon.

But it's like stuck there. And so that's one way you can have a little signpost. You know, if you fly by, you think it's moving at the speed of light. It flies past you at the speed of light, but it's sitting right there at the event horizon.

But it's like stuck there. And so that's one way you can have a little signpost. You know, if you fly by, you think it's moving at the speed of light. It flies past you at the speed of light, but it's sitting right there at the event horizon.

Yes.

Yes.

Yes.

It just gets stuck there. Now, it's very unstable. So the star can't sit there is the point. It just can't. So it rains inward with this waterfall. But from the outside, all we should ever really care about is the event horizon because I can't know what happens to it.

It just gets stuck there. Now, it's very unstable. So the star can't sit there is the point. It just can't. So it rains inward with this waterfall. But from the outside, all we should ever really care about is the event horizon because I can't know what happens to it.

It just gets stuck there. Now, it's very unstable. So the star can't sit there is the point. It just can't. So it rains inward with this waterfall. But from the outside, all we should ever really care about is the event horizon because I can't know what happens to it.

It could be pure matter and antimatter thrown together, which annihilates into photons on the inside and loses all its mass into the energy of light. Won't matter to me because I can't know anything about what happened on the inside. Wow.

It could be pure matter and antimatter thrown together, which annihilates into photons on the inside and loses all its mass into the energy of light. Won't matter to me because I can't know anything about what happened on the inside. Wow.

It could be pure matter and antimatter thrown together, which annihilates into photons on the inside and loses all its mass into the energy of light. Won't matter to me because I can't know anything about what happened on the inside. Wow.

I don't mind being incautious about thinking about what the math tells us. I'm not such an observer. I'm very theoretical in my work. It's really pen on paper a lot. These are thought experiments that I think we can perform and contemplate. Whether or not we'll ever know is another question.

I don't mind being incautious about thinking about what the math tells us. I'm not such an observer. I'm very theoretical in my work. It's really pen on paper a lot. These are thought experiments that I think we can perform and contemplate. Whether or not we'll ever know is another question.