The latest research finds that the black hole is only 1600 light-years away from the earth.

The distance between a black hole and the earth is only half the amount that people used to think.

Astronomers have discovered that the distance between a black hole and the earth is only half the amount that people used to think. This is the first time to accurately measure the distance between the earth and the black hole. But if you hear that it is 7800 light-years away from Earth (1 light years equivalent to 5 trillion and 800 billion miles, 9.3341952 * 1015 meters) before you want to hide it, you may breathe a little easier. However, the nearest black hole is only 1600 light-years away from our green home.
A black hole is a region of space. Nothing can escape the attraction of a black hole, even if the light is no exception. The point where there is no return is called "event horizon". The researchers said that the analysis of the researchers showed that the black hole was born from supernovae (Star explosions), moving at about 25 miles (40.23 kilometers) per second in space. The star eventually collapsed and formed a point of zero volume and density, known as "singularity".

The gravity around the singularity is so strong that even if the light breaks in, there will be no return. Therefore, no information can be transmitted to us from this area. For this reason, we call it black hole, whose surface is called the surface of the black hole. The research team led by Peter Jokel (Peter Jonker) of the Netherlands Institute for Space Research (Institute), by measuring the radio waves emitted by the black hole, and studying the V404 Cygni accompanying its dying star, Cygnus, has finally made a breakthrough, measuring the distance between the black hole and the earth.
They use the radio telescope around the world to measure the distance between the earth and that black hole. Astronomical distance is difficult to calculate because it involves a very wide area.However, they often use the Trigonometric Parallax method to measure. The method of trigonometric parallax is to compare the apparent motion of nearer stars with the apparent motion of more distant stars by comparing the observed data of 6 months before and after the final result.

The research team applied this method to black holes and stars V404 Cygni, which is gradually absorbed by black holes. By this method, the distance between the black hole and the earth is measured to be 7800 light-years, with a measuring error of less than 6%. They believe that due to previous scientists underestimate the adsorption of interstellar dust, overestimate the distance between the black hole and the earth, the error is 50%.

Dr Jokel said: "through these information, we can better understand the evolution of black holes.For example, we hope to answer the following questions: directly from the collapse of stars, there is no difference between the black hole of supernovae and the black holes evolved through supernovae (short intermediate stars). We hope that we can get an unexpected surprise for the study of the latter group of black holes. The black hole formed in this way will move faster in space later. " Researcher James Miller Jones (James Miller-Jones) said: "now we are trying to apply the same measurement method to several other black holes."

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