According to the Russian satellite network reported on the 18th, Natan, a senior researcher at the Institute of space research of the Russian Academy of Sciences? Esmont said on the "Star" TV program that there are about 23000-24000 potentially dangerous space objects, which can cause regional or global disasters on earth in the event of collision. Esmont said that in the next 200 years, potentially dangerous asteroids will not collide with the earth. These asteroids are large and their orbits are tracked by special departments. "There are a considerable number of objects that pose a potential threat. For example, there are about 23000-24000 objects that will collide with the earth in a thousand years," esmont said He said that one of the most worrying objects is the asteroid Apophis, which is about 430-450 meters in diameter. He pointed out that according to the prediction, in ten years, the celestial body will be close to the earth, only 30000 kilometers away from the earth. "This is closer than the communication satellite, which is at an altitude of 36000 kilometers. If there is any danger, then the asteroid will collide with the geosynchronous satellite, which may collide. If it is estimated that its mass is about 50 million tons," he said (Xinhua News Agency)