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The solar constant is thus expressed at the thermopause. Beyond (above) this, the exosphere describes the thinnest remainder of atmospheric particles with large mean free path, mostly hydrogen and helium. As a lower boundary for the exosphere this boundary is also called the exobase. [1]
The lower boundary of the exosphere is called the thermopause or exobase. It is also called the critical altitude , as this is the altitude where barometric conditions no longer apply. Atmospheric temperature becomes nearly a constant above this altitude. [ 5 ]
In the exosphere, beginning at about 600 km (375 mi) above sea level, the atmosphere turns into space, although, by the judging criteria set for the definition of the Kármán line (100 km), most of the thermosphere is part of space. The border between the thermosphere and exosphere is known as the thermopause.
The exosphere is the outermost layer of Earth's atmosphere (though it is so tenuous that some scientists consider it to be part of interplanetary space rather than part of the atmosphere). It extends from the thermopause (also known as the "exobase") at the top of the thermosphere to a poorly defined boundary with the solar wind and ...
Exosphere – The outermost layer of an atmosphere; Exobase – The lower boundary of the exosphere; Thermopause – The upper boundary of the thermosphere; Thermosphere – The layer of the atmosphere above the mesosphere and below the exosphere; Mesopause – The temperature minimum at the boundary between the mesosphere and the thermosphere
First rocket to pass the thermopause and enter the exosphere. At 682 miles (1,098 km) altitude and 3,335 miles range, the 3-stage Jupiter-C breaks both records and achieves MACH 18 velocity. At 682 miles (1,098 km) altitude and 3,335 miles range, the 3-stage Jupiter-C breaks both records and achieves MACH 18 velocity.
Exosphere is defined by the large mean free path, vs. thermal models that can be used below. === Exobese vs. Thermopause Bold text This difference is explained on Talk:Thermopause . —Preceding unsigned comment added by 76.4.182.98 ( talk ) 04:29, 13 February 2008 (UTC) [ reply ]
1.1 Thermopause vs. Exobase. 1.1.1 Thermopause. 1.1.2 Exobase. 2 Combine Exobase from Exosphere and Thermopause here. 1 comment. Toggle the table of contents. Talk ...