Listen: Galaxy, Niagara Falls And Mario discussed on Jay Talking
"News recently is the imaging of supermassive black hole. Now, I think we all have a kind of concept of the black hole is it's it's matter that so dense, and and it creates such strong gravity that nothing can escape not even light. And there are ordinary black holes which are caused by the deaths of stars. But. But there are these huge monstrous black holes that live in the cores of virtually every galaxy. So there's a particular galaxy called MAD seven that's fifty five million light years away. And that means that the light is reaching us that was generated fifty five million years ago, not long after the dinosaurs died, and we've known that there was a black hole supermassive black hole at the center of this galaxy and but it's it's you know, on that scale. It's it's so small because it's so far away. It's hard to actually see it, even if you could sit, and that's the whole problem here because you can't see a black hole because the light is escaping. But what you can see and what they eventually were able to do is to see light swirling around it just before it dives in never to be seen again. And it they used a combination of radio telescopes. That's that picture that you saw with the orange glow is actually a raid. Radio. Right. That's kind of a bummer Farsi wouldn't be able to see that by. But it it took the combined efforts of radio observatories all across the planet. The reason gets a little technical. But the bigger across your telescope is the reason Mario's got a thirty two inch wide telescope, and now the three inch wide telescope is it allows him to see fainter finer detail, and so by combining these radio telescopes very carefully output, you effectively get the the equivalent of a radio telescope as big as the earth, and it was that achievement that allowed us to image this black hole. So this is a radio telescope image. And it doesn't really look like the picture. We saw somebody has to decide to take the radio image. If you could it looks like, you know, the visual. Bradley. Remember, those those comic book ads for the x Ray glasses. Right. Well, if you could see the universe at radio, wavelengths radio is a kind of light. If you wanna think of it that way, it's a wave. It's dramatic magnetic wave just like visible light is if you could see the universe at radio wavelengths. Yes. You could see this black hole. Would you see as the would it look like the image? We see would it really have a yellow light around the edge. I it's it's basically a a black and white image. All right that has been colored. And so it wouldn't be orange, right? Actually, the the colors from that is is mostly blue going into a violent and ultra violet Larry energy light. Okay. So. You couldn't see it really. And you touched on how they knew it was there. But there's more to it than just their number ways. They figured it was probably there what what are some of those. So we let's come a little bit closer to home our own Milky Way. Galaxy has a supermassive black hole in its core now on a summer's night when you can see the Milky Way and you look toward the south toward the constellation Sagittarius. The Archer you see this great swarm of of bright stars and that is toward the center of our galaxy. And we can't actually see the center because there's a lot of gas in the way, that's where the radio comes in radio can penetrate through the gas just like radio links here on earth can penetrate. Clouds, we can pick up radio waves on a cloudy day. No problem. Similarly, we can see with radio to the center of our galaxy. We see stars very close to this black hole swirling around like crazy. They're spinning around every few days in orbit around it. And the only way the star could be moving that fast is if the object orbiting is hugely massive. And that's what's telling us, even if we can't see these things we know that there's a huge mass there that is this supermassive black hole. Okay. So the tight spin the stars necessitates super massive object. But you couldn't see a superstar brightly so had to be kind of the opposite of that. Yeah. So in this particular case, the the glow that you see around it is this gas wurley around about to enter, and it's and it's heated to great temperatures because of the friction of getting into that. And then and so if we could see the center of our galaxy we'd see a very similar kind of thing. So the whole dark area that you see in the center is somewhat larger than our solar system. And and it takes light. I think a day in half to cross it. So it's it's, you know, billions of miles across. That's not the black hole itself. That's what we call the event horizon. That's the the sort of boundary. The Niagara Falls after you know, after light crosses that. There's no coming back. And so that's why it looks black. The black hole itself is quite a bit smaller than that. And we have no hope of seeing itself."