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Line Pockets
Material posted: Publication date: 13-04-2017
Space begins where the aircraft becomes impossible. Guided by this principle, the international aeronautical Federation (FAI) established a conditional boundary between the atmosphere and outer space at height of 100 km above sea level.

The Earth's atmosphere continues beyond the line of the Pocket. The outer part of the earth's atmosphere, the exosphere, extends to a height of 10 000 km and more, at this altitude the atmosphere is composed mainly of hydrogen atoms, capable of leaving the atmosphere.

Line Pocket slovoteka, st-science, word, dictionary, Space, atmosphere, video, donapost

Height was named after Theodore von Karman (1881-1963), an American scientist of Hungarian origin. He determined that, starting from this height, use the wings to fly does not make sense – the atmosphere becomes so rarefied that the Aeronautics becomes impossible.

Line Pocket slovoteka, st-science, word, dictionary, Space, atmosphere, video, donapost

In order to create lift to fly, you must develop a speed in excess of the first space, and it is 7.9 km/s But after reaching that speed, any object goes into orbit and becomes a satellite of the Earth.

The definition of this height is conditional, since the density of the upper atmosphere varies periodically and there is no explicit physical boundary, beyond which the atmosphere ends and space begins.

The height of the line Pocket emphasizes these facts:
• NASA considers astronauts people rose to a height of 50 miles (80.5 km).
• Effect of atmospheric winds can be traced to a height of 118 km.
• Shuttles switch from missile aerodynamic maneuvering at an altitude of 122 km.
• Most of the meteors burning in the atmosphere at a height of 50-80 km.
• At less than 130 km orbital flight is impossible: the space ship descends from orbit in less than one revolution.
A history of overcoming the line of Pocket

The first ever man-made object to cross the line of the Pocket, a rocket "V-2 (A-4)", in 1944, reaching an altitude of 188 km.

iniya Pocket slovoteka, st-science, word, dictionary, Space, atmosphere, video, donapost

The first living creatures to break the line of the Pocket and returned to the Earth alive, become common fruit fly-Drosophila. On 20 February 1947, the year the United States launched a missile "V-2" with tiny astronauts on Board to study the impact of solar radiation on living organisms. The experiment was successful: reaching a height of 109 km, fruit flies returned to Earth unharmed.

Through more than two years after the success of fruit flies, June 14, 1949, the "V-2" in space went to albert II, a small rhesus monkeys. The rocket rose to a height of about 134 km, however, the decline in Alberta was not lucky – there is a problem with the parachute, causing the monkeys became one of the first victims of space exploration.

Line Pocket slovoteka, st-science, word, dictionary, Space, atmosphere, video, donapost

The first mammals break the line of the Pocket and returned to the Earth alive, were the dogs Dezik and Gypsy, launched in the USSR on 22 July 1951 from the Kapustin Yar, Astrakhan region in the framework of the project of VR-190 to a height of about 100 km.


Source: http://pikabu.ru/story/liniya_karmana_4976695

Tags: space


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