The world's second black hole photo is announced!

The world’s second black hole photo announced! Can high-definition images reveal the mystery of quasars?

After a long study of a black hole in April 2017, astronomers from more than 30 research institutes around the world have finally finished filming this black hole.

In April 2019, the first photograph of a black hole was declared an important milestone in the study of black holes.

A year later, astronomers released the world’s second photograph of a black hole. A photograph of the central core of the quasar 3C 279 and its reactive origin. It was taken in April 2017 at a distance of 5.5 billion light-years.

On April 7, 2020, local time, the corresponding research results were published in the journal Astronomy & Astrophysics. The Research was published under the title “Visualization with the Event Horizon telescope” of the archetypal blazar 3C 279 with a maximum resolution of 20 microseconds.

Mysterious heavenly body

Presumably, everyone has heard of black holes.

In 1915, Einstein completed the foundation of his general theory of relativity and officially published. The general theory of relativity predicts that in outer space there is a celestial body that is caused by the gravitational collapse of a sufficiently large star after the fuel of the nuclear fusion reaction is exhausted and dies. The density of this celestial body is extremely high, the body is actively low, and gravity is also extremely strong. So strong that even light is attracted and cannot escape.

In 1916, the German physicist Karl Schwarzschild made an exact solution for this prediction. Karl Schwarzschild calculated a vacuum solution of the Einstein field equation, which shows that if the actual radius of the static spherically symmetric star is less than a fixed value (this is a certain value – the famous Schwarzschild radius), and around strange phenomena will occur to him: as soon as you enter the interface called “Vision”, even the light cannot exist.

It was not until 1969 that American astrophysicist John Archibald Wheeler first proposed the concept of a “black hole” and has since spread the world.

In 1970, the American Freedom satellite discovered Cygnus X-1, which is different from other sources of rays. Cygnus X-1 has a huge blue planet, 30 times heavier than the Sun. An invisible object, heavy as the sun, pulls. Astronomers agreed that this object was a black hole, which was also the first black hole in the history of human discoveries.

In general, the study of black holes by scientists is very difficult. Most of the reason is that black holes cannot be observed directly. So scientists can only learn about their existence

Lei learned that before an object is inhaled by a black hole, the acceleration caused by the gravity of the black hole will cause friction. Which will release the “information about the edges” of X-rays and gamma rays. And this is the evidence that scientists have received for the black hole. Of course, by indirectly observing the trajectory of stars or interstellar clouds.