Continuing our top 10 ranges, today we will write about top 10 largest cities in the world by land area.
Telescope ROSAT with a mass of about 2.4 tons,which has completed its work in 1999, will fall to Earth on October 22-23 and is expected that the 30 fragments with a mass of 1.6 tons reach the surface, the potential impact area extends from Berlin and Samara in the north to Tierra del Fuego archipelago in the south. ROSAT will be the next Space “heavyweight” of the 1990s after the American satellite UARS (Upper Atmosphere Research Satellite) with the size of a bus and weighing 6.5 tons, pieces of which fell on September 24. ROSAT was created DLR and launched by NASA in 1990. Initially the device was designed for 18 months of work, but engineers have found a way to deal with “aging of the” instruments, and as a result ROSAT was disabled until February 1999.
Now Its orbit is gradually decreasing, according to data Monday morning, October 17, the device was observed at an altitude of about 226 kilometers above the Earth. The estimated probability that the fragment from ROSAT suffer any people on the planet is about 1 to 2000. In the case of UARS this probability is estimated at 1 in 3200. If fragments of the telescope reach the Earth, the area of their fall will be a strip along the flight path width of up to 80 kilometers.
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