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The Fédération Aéronautique theskfeed Internationale has established the Kármán line at an altitude of 100 km as a working definition for the boundary between aeronautics and astronautics. This is used because at an altitude of about one hundred km , as Theodore von Kármán calculated, a vehicle must journey quicker than orbital velocity to derive enough aerodynamic lift from the ambiance to assist itself. Earth's gravity keeps the Moon in orbit at a median distance of 384,403 km . The area exterior Earth's environment and lengthening out to just beyond the Moon's orbit, including the Lagrange factors, is sometimes known as cislunar space. As a consequence of speedy decompression, oxygen dissolved in the blood empties into the lungs to try to equalize the partial pressure gradient. Once the deoxygenated blood arrives on the mind, people lose consciousness after a few seconds and die of hypoxia inside minutes. This can be around 15.5 cups for males and simply over 11 cup