What is the upper atmosphere?
The upper atmosphere is generally considered to be the thermosphere, a thin, outer layer of the Earth's atmosphere, which starts around 56 miles (90 kilometers) and stretches up to about 375 miles (604 kilometers). Spacecraft, such as the International Space Station (ISS) or American Space Shuttle, usually orbit in the upper atmosphere of about 140 miles (225 kilometers). On the other hand, a commercial aircraft travel at a much lower stratosphere that extends up to a maximum height of 31 miles (50 kilometers), where there is an ozone layer of the Earth, while the air concentration in the upper atmosphere of the country is compared to what people experience on the surface of the Earth. Estimates for atmospheric gases in the upper thermosphere increase the temperature of up to 3,600 ° Fahrenheit (2,000 ° Celsius). However, due to the rareatmospheric gases at this level, their heat is not transferred to the objects passing through the region.
the fifth layer of the upper atmosphere, which is connected to the vacuum of space and is often not considered part of the real atmosphere, is an exossual. The air density is extremely low and the area extends from about 375 miles (604 kilometers) to 6,200 miles (9,978 kilometers). The exosphere is associated with the areas of the van Allan radiation belt above it, an area of heavily charged magnetic particles generated and held on site by the Earth's magnetic field. The exosphere is so thin that in higher areas there are only about one atom or hydrogen on a cubic centimeter and more than 50% of such molecules eventually escape into space. The area is used for many satellites with a low orba advocate who is not affected by rare gases.
One of the unique aspects of the upper atmosphere is that it is a home Auroras, such as Aurora Borealis and Aurora Australis or Northern Lights and southern lights, which are most clearly visible to 10 ° to 20 ° latitude of the North or South Poles. Lights are generated by magneticThe effects that the Earth creates when interacts with the solar wind and atmospheric gases at this level. The colors that show light in the upper atmosphere depend on the type of air molecules that are affected, with green to brownish red produced by oxygen, blue from ionized nitrogen and red nitrogen in lower energy.