Discover Black Holes by Using an Easy Mind MapNancy
We often see black holes in science news, books, or fiction movies, which are inferred from scientific theory. In 2014, for example, in Christopher Nolan’s sci-fi movie Interstellar displayed a supermassive black hole called Gargantua shrouded in a halo. Gargantua is simulated by a computer under the guidance of physicists. So far, there are also lots of indirect pieces of evidence to prove that there are many black holes in the universe. Later, in 2016, we observed gravitational waves and knew what a black hole “sounds like”, but we would like to know more about what it “looks like”.
Fortunately, on April 10, 2019, astronomers held conferences in Brussels, San Diego, Shanghai, Taipei, Tokyo and Washington to announce that for the very first time in human beings’ history, a black hole is directly photographed. Since 2015, more than 200 astronomers from worldwide nations and regions have carried out massive data analysis and theoretical speculations, and have used astronomical telescopes to finally achieve this result. The black hole in this photo is from the Sagittarius, which is at the center of the galaxy. It is located 53 million light-years away from Earth and has a mass equivalent to 6 billion suns.
Next, let’s find out more interesting things about black hole by using a mind map!
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What is a Black Hole?
A black hole is a kind of celestial body with the largest density and the smallest volume in general relativity. It is generated from the gravitational collapse of stars after their exhaustion. However, there is no final agreement for the formation of medium-mass black holes: it may be formed by the merger of small black holes or by the gradual formation of black holes through the phagocytosis of materials. Black holes are so gravitational that even light cannot escape them. In 1916, a German astronomer Karl Schwarzschild referred to Einstein’s research and discovered black holes through calculations. Since then, Steve Hawking, the famous British physicist, explored more details about black holes.
How to Shoot a Black Hole?
The most impressive thing about black holes is that they devour everything. Black holes cannot be observed or photographed directly, but their existence can be discovered indirectly. Instead of shooting a black hole itself, we usually prefer to photograph the outline of a black hole by detecting radiations from its boundary. We can also observe the orbits of stars or interstellar clouds to obtain the location of black holes.
The significance of Black Hole Photo Publication
This important discovery not only gives us the access to the real face of black holes but also helps us to verify Einstein’s general relativity and the physical properties of black holes, including the diameter, rotation speed of black holes and so on. In addition, the black hole photography will also help us to discover the evolution of galaxies. Furthermore, the finding brings confidence to scientists in researching more about the profound nature of time, space, and light.
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