Orbiting the Earth in June was 7.2 thousand tons of man-made space debris — spent rocket stages, fragments of exploded satellites and other objects. The mass of all active satellites is 2 thousand tons, estimated by the astronomer from the Harvard-Smithsonian center for astrophysics, Jonathan McDowell.
Hardest orbit of the Earth to contaminate the United States — the country accounts for around 3.2 tonnes of debris of satellites and rockets. In second place Russia and the Soviet Union (1.7 million tons), the third — Europe and China (900 and 450 tons respectively), informs news.enovosty.com.
To date, orbiting the Earth there are more than 175 million space debris objects with a diameter greater than 1 cm moving at a speed of more than 28 thousand km/h. Of these, 18 thousand objects — man-made, the others have a cosmic origin.
About the location of the majority of the objects the scientist is unknown. While space junk is a real threat: in the collision of a few large objects will start a chain reaction that could destroy all satellites in orbit.