Space Junk NASA Satellite Debris Hardly Any Danger Cause. As big as a school bus and weighing tons: Friday is the discarded satellite UARS plunge to earth. Despite all the speculation it will probably hurt anybody. Russian media speculate whether the wreckage of a satellite in the city of Moscow could take on Friday. That reported the News Agency dpa briefly last week. Legitimate concern or rather unfounded fear?
The potential culprit is UARS (Upper Atmosphere Research Satellite) is an inactive research Sputnik of the American space agency NASA. The schulbus-sized monster with a weight of 5.6 tons of good will probably occur on Friday afternoon (US Eastern Standard time) in the Earth’s atmosphere according to new calculations and there burn up – but not completely. Exactly 26 swooping debris could be left. It is questionable whether they cause but greater damage.
Although NASA scientists still not exactly to specify where and when UARS will occur in the atmosphere. Also, where the fragments are hit, they don’t know exactly. Only 20 minutes before the impact of the place could be determined. However, since 90 percent of the Earth’s surface are uninhabited, is the probability that people are hit by the fragments, only 0.03 percent. Thus, the Colossus from space is exposed in 1991 by the space shuttle Discovery in orbit, officially not even as a “Risk object”.
The 26 parts where the heat enters the atmosphere will harm will probably have a weight of 532 kg. In 2002, which calculated the NASA. You are all that is left of the ten-meter-long science satellites.
It is almost apologetic in the risk analysis of NASA: when UARS designed was built and sent into space, there were no victims risk limits. Now you try themselves with foreign space agencies therefore, that decreases the probability of a fatal incident by swooping satellite parts to less than 0.01%.
Biggest Threat From Space Junk In Orbit
Charged the space agency has, however, in part, as far as concerned the originally envisaged date of the crash. UARS ultimately would take in parts of on Earth, was only a matter of time. However, experts expected return the scrap remains before the end of the year on Earth. In 2005 he left its orbit, long the fuel is considered him. On his mission, UARS collected data to ozone levels, solar energy and wind and temperatures in the stratosphere at an altitude about 600 kilometers.
The NASA specialist for space junk, Mark Matney, told to AFP that a flying object the size of the UARS to Earth crash on average once per year. The largest of its kind was Salyut 7, whose fragments 1991 fell on a town in Argentina, without that people were made the Soviet space station. In the past 50 years space agencies registered an average of a piece of space junk per day, that struck on the Earth. These parts land mostly in the ocean or in scarcely populated areas of the Canadian tundra, the Australian outback or Siberia. Never was reached in serious injuries or damage.
The biggest threat from space junk is still in Earth orbit. There, not only the estimated at around 800 commercial and military satellites into a real shambles of exploded missiles, Prime and inactive satellites. Also the international space station is under threat. Most recently she evacuated for a short time in June, as a part of the debris. According to estimates, more than 100,000 of these fragments orbit the Earth, where most are not greater than pebbles. Between 12,500 and 18,000 scrap parts be observed from the space agencies. Speed with around 28,000 kilometers per hour around the world.