First determine the rotation speed of the black hole

The latest study by a team of scientists from the Aerospace Exploration Research Agency says the black hole's rotation speed is actually one-fifth the speed of light.

This is the first time scientists around the world have determined the rotation speed of black holes.

Constellation Sagittarius.

To conduct a determination of the rotation speed of the black hole, the scientists observed an object the size of four million times the Sun from the target point, the constellation Sagittarius in the center of the galaxy.

Because the black hole does not glow, it is difficult to observe, so to accurately determine the rotation speed of the black hole, during the observation process, the scientists chose a new method, ie through numerical analysis. Infra-red rays have calculated the black hole's rotation speed by 22% of the speed of light.

The results of this study negated the hypothesis that many scientists had previously suggested that the rotation speed of a black hole was 45% of the speed of light.

According to scientists, in the process of rotating, the black hole may rotate even more slowly. This is because the rotating process consumes some of their energy.