NASA presented a visualization of a black hole
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it looks like the black hole at the presentation of NASA
Here came that day. Now we can enjoy the real visualization . So to speak, to get acquainted with the everyday life of these space monsters. The fact that NASA has released an impressive visualization of a simulated black hole which shows how extreme gravitational forces created by these massive objects distort light around himself, creating the effect of a curved mirror. The visualization of different angles are shown the remains of stars that died as a result .
what is a black hole?
If looking at this visualization, you do not fully understand what is happening, tell. One of the most notable features of this video is "accretion disk" of a black hole — hot, thin, rotating disk formed by matter that spirals slowly into the center of the object. As soon as the substance is absorbed, the emitted light gets distorted, creating a distinctive appearance.
Frame from a video simulation of NASA
The Substance in the disk that is closest to the center, moving incredibly fast, spinning at a speed close to the speed of light. Meanwhile the outer part of the disk move a little slower. When we look at the black hole side, the left side of the accretion disk looks brighter than the right. This can be explained by the phenomenon known as "Doppler radiation", in which the apparent brightness of the substances, moving at a speed close to the speed of light changes under the influence of the phenomena described by albert Einstein.
However, when we look at a black hole directly, face to face, differences in brightness are not visible, since the substance on the disk is not moving. In the center of the imaging area is devoid of light, known as "the shadow of the black hole", which is about twice the event horizon — the point where, due to the strong gravitational attraction, can not escape, even light. Beyond the event horizon all the laws of physics don't work and gravity is infinite.
Finally, a careful observer will pay attention to "ring photon", framing the center of a black hole. It looks almost identical from any angle in the visualization. Actually, light, can rotate around the black hole several times before to escape and become visible.
How to create a visualization of a black hole?
The Creator of the visualization Jeremy Schnitman, from space flight center name Goddard NASA in Greenbelt, Maryland (USA) believes that such simulations help to understand what is meant albert Einstein, when he described how gravity distorts the fabric of space-time. Scientists say that until recently, imaging was limited by the imagination and software. Now, thanks to the efforts of professionals, we are able to see .
Recall that in April of this year, scientists working with a global network of radio telescopes Event Horizon went down in history, showing the world the image of a black hole located in the center of the galaxy M87, located at a distance of 53 million light years from Earth. According to experts, almost every galaxy in the Universe in the center is a supermassive black hole.
According to the scientists who worked on the creation of video, the process was divided into two stages. Was first written a computer program to calculate how the light moves around the black hole and how it would look from afar. Were then modeled other elements, rotating around the black hole, including the magnetic field. What we see in the video was the result of combining two programs.
Sharing these videos with other scientific data allows you to understand how beautiful and frightening at the same time is General relativity. Let's imagine that travelling into space become a reality. Some would see a black hole, cosmonaut, being nearby? Experts believe that the fact that he could see looked almost as well as the video.
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