Perhaps, but Kurzgesagt's explainer certainly helps bring us a little closer.įollow CNET's 2021 Space Calendar to stay up to date with all the latest space news this year. The EC Boston TOEFL class jumped into black holes by reading about astronomy, watching and discussing a short documentary, and writing about an experience inside one of the most mind boggling theories in the universe.
![jour ey into a black hole jour ey into a black hole](https://ichef.bbci.co.uk/images/ic/1200xn/p08lhnzb.jpg)
"There is no good concept to help our brains grasp these timescales," the trusty narrator says. Later in the piece, Kurzgesagt explains how long black holes live for. Astronomers recently saw this happen to a star in real time, about 215 million light-years from Earth. Fortunately, we don't have the capability to get close to a black hole quite yet, so humans don't need to worry about this. When an object gets close to a black hole, the side that's closer to the behemoth is pulled more strongly by gravity than the side that's farther away. Guided by the physicist and author of Black Hole Survival Guide, Janna. The video also explains the concept of "spaghettification," which we've discussed in the past. Black holes pull in the matter surrounding them and anything that enters can never escape. In the mind-bending, universe-breaking video uploaded on Tuesday, the Kurzgesagt team take viewers deep inside a black hole, explaining what happens if you fall in and the fate that awaits the hole - in the inconceivably distant future - when it begins to die. Kurzgesagt's latest video is dubbed the "ultimate guide to black holes" and it's an absolute must-watch. For those unfamiliar with the channel, I can't recommend it more: The team's unique art style and clear, straightforward explanations are unmatched. One of the best and most visually impressive science channels on YouTube is Kurzgesagt, a Munich-based team of animators who consistently knock it out of the galaxy when it comes to explaining concepts like string theory or genetic engineering. Last week, we were fascinated by the tiny "unicorn" black hole discovered close to Earth. If you had access to the appropriate sensors then I think this simulation is pretty realistic.If you're a longtime reader of CNET Science, you know we're very, very interested in black holes.
![jour ey into a black hole jour ey into a black hole](https://jila.colorado.edu/~ajsh/insidebh/divestereo.jpg)
I think if a person actually did fall into a black hole they wouldn't be able to see very much most things would be too cold or too hot to emit visible light. You can't really see the entire Poynting flux directly, so that part isn't realistic either.īasically this simulation shows a lot more detail than you would actually ``see'' if you had the misfortune to fall into a black hole. (A lot of the light you would see would be in the UV or X-ray range, so you might get cooked pretty quickly but you wouldn't see much.) The colour is not realistic you wouldn't see the same colours if you actually fell into a black hole. The simulation is fairly realistic the differences between the proper geometry for a rotating black hole and a non-rotating one don't significantly affect what you would see. The black hole itself isn't realistic, a real black hole would almost certainly be rotating. Its these bits which confused me, hence "how realistic is this black hole "? So it is a bit of an exaggeration to say ``the entire history of the Universe'', but it sounds poetic and isn't totally incorrect. But everything since then will be trapped at the inner event horizon.Įven light from events which happened before the black hole was formed can be trapped here, as long as those events happened far enough away from the black hole. This doesn't really contain the entire history of the Universe, since the very early stages didn't have any light. Since light is (obviously) travelling at the speed of light, all the light that has ever entered this black hole will be trapped at that point. And if you are travelling exactly at the speed of light you will circle around the black hole forever one this inner horizon. Rutgers University mathematician Alex Kontorovich takes us on a journey through the continents of mathematics to learn about the awe-inspiring symmetries at. If you are limited to travelling slower than the speed of light you will never escape and will fall towards the centre of the black hole. In other words, if you can (somehow) travel faster than the speed of light you can escape out from the inner horizon. The inner one (the ``Cauchy horizon'') is a trap for speed-of-light geodesics.
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In this case there are two event horizons. The website shows the simulation of the electromagnetic Poynting vector in a Reissner-Nordstrom black hole (charged but not rotating). It says the burst of light contains the entire history of the Universe, how do they know that?