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21 lis 2023 · The Earth’s atmosphere is an extremely thin sheet of air extending from the surface of the Earth to the edge of space, about 60 miles above the surface of the Earth. If the Earth were the size of a basketball, a tightly held pillowcase would represent the thickness of the atmosphere.
- Atmosphere
The Earth is a sphere with a roughly 8000 mile diameter; the...
- Atmosphere
The atmosphere has a mass of about 5.15 × 10 18 kg, three quarters of which is within about 11 km (6.8 mi; 36,000 ft) of the surface. The atmosphere becomes thinner with increasing altitude, with no definite boundary between the atmosphere and outer space.
Earth is surrounded by a mixture of gases called the atmosphere. The composition of the atmosphere is 78 % nitrogen and 21 % oxygen, with the remaining 1 % consisting of water vapor, argon, carbon dioxide, and small amounts of other gases.
29 lip 2023 · The total mass of Earth’s atmosphere is about 5 × 10 18 kilograms. This sounds like a large number, but it is only about a millionth of the total mass of Earth. The atmosphere represents a smaller fraction of Earth than the fraction of your mass represented by the hair on your head.
13 maj 2021 · The Earth is a sphere with a roughly 8000 mile diameter; the thickness of the atmosphere is about 60 miles. In this picture, taken from a spacecraft orbiting at 200 miles above the surface, we can see the atmosphere as the thin blue band between the surface and the blackness of space.
where H = RT/Mg is called the scale height of the atmosphere. Assuming an av-erage atmospheric temperature of 240 K gives the scale height of the Earth’s atmo-sphere as about 7 km. The thickness of the atmosphere is remarkably small compared to the size of the Earth — equivalently thinner than the thick ness of the peel of an apple.
The Aerospaceweb.org Atmospheric Properties Calculator computes conditions of the atmosphere, airspeed conversions, and basic aerodynamic quantities on a reference body. The calculator is based on methods documented in the official U.S. Standard Atmosphere 1976 .
