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Of course, nothing has really changed (unless you take into account the constant and accelerated expansion of the universe). But this week's new study suggests that it's time for Earthmen to change the imagination, where the Earth's atmosphere ends and the cosmos begins
If the astrophysicist's calculations Jonathan McDowell are correct, the space boundary, where the laws of aerial law place the laws of orbital flight may be closer than we think – even at a distance of 20 kilometers closer than suggested by previous estimates.
"The end of the atmosphere and the beginning of space were debated before the launch of the first satellite, the Sputnik satellite.The generally accepted threshold is the so-called Karman line, usually located at altitude of 100 km, "writes J. McDowell, astrophysicist of Harvard-Smithson, in an article in the October issue of Acta Astronautica
.This number of scientists now recognizing the Karman lineage is based on dozens of years of misunderstanding of information that does not take into account real orbital data. Fortunately, the data is the business of J. McDowell (and his hobby – he keeps a accurate record of all rocket launches during his free time) and he knows where to look for an evidence-based answer.A orbit of 43,000 satellites collected from NORAD (North American Aerospace Defense Command), who watched in the airspace of the United States and Canada. The vast majority of J. McDowell's research satellites were irrelevant – they flew over the proposed Karman line and were already definitively in space.
However, 50 of these satellites were different. At the end of their mission in the atmosphere, all these satellites managed to cover the Earth at least twice in the orbit of 100 kilometers. For example, a Soviet electron-4 satellite in 1997, before reaching the atmosphere and burning, surveyed the planet at a height of 85 kilometers 10 times
Of these cases, it seemed clear that Cosmic physics operated far below the Karman line. Using a mathematical model, McDowell searched for a point where various satellites eventually left the orbit and blazed the atmosphere and found that it could happen from 66 to 88 kilometers. However, the usual death sentence sounded when the machine landed below 80 km
For this reason, J. McDowell chose the limit of 50 miles (80 km) as the true lower limit of space . However, this number corresponds to several other cultural and atmospheric factors. For example, J. McDowell writes that in the 1960s, US Air Force pilots were awarded special "astronaut wings" for an airplane climb over 50 miles because it was considered the upper limit of the atmosphere
. Mesopotamia – the coldest Earth's atmosphere – stretches for about 85 to 100 kilometers above the surface of the planet. Here the chemical composition of the atmosphere begins to change radically and more particles become more energetic. (In other words, it is very similar to the space.) It is clear that under the lower edge of the mezopoietic world, the atmosphere of the Earth becomes a stronger force with which flying objects must be read, writes J. McDowell
. satellites generally collapse in the 70-100km band, confirming that the effects of the atmosphere are becoming significant in the region, "notes J. McDowell.
And if the boundary between the Earth and the space was 20% lower, which is okay now? The launch of missiles or other activities in the space will not change that, wrote M McDowell, but this can raise important political and territorial issues.
The airspace of a given country is considered to be part of that country; while the space is For example, if the space starts at 100 km and the United States steals their satellite 84 km above China, it may legitimately be considered an act of military aggression [19659004ThismeansthatMcDowell'sproposed50-milelimitinthenearfuturewillprobablynotbecomealegalthresholdcompellinganduniversallyacceptedHoweveriftheburdenoflifeonEarthhastogodowntakealookandrejoicethatyouareclosertoheaventhanyouwerelastweek
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