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23-Jun-2019 04:02

Atmospheric effects become noticeable during atmospheric reentry of spacecraft at an altitude of around 120 km (75 mi).

Several layers can be distinguished in the atmosphere, based on characteristics such as temperature and composition.

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among which are the greenhouse gases, principally carbon dioxide, methane, nitrous oxide, and ozone.The three major constituents of air, and therefore of Earth's atmosphere, are nitrogen, oxygen, and argon.Water vapor accounts for roughly 0.25% of the atmosphere by mass.Air content and atmospheric pressure vary at different layers, and air suitable for use in photosynthesis by terrestrial plants and breathing of terrestrial animals is found only in Earth's troposphere and in artificial atmospheres.The atmosphere has a mass of about 5.15 three quarters of which is within about 11 km (6.8 mi; 36,000 ft) of the surface.

among which are the greenhouse gases, principally carbon dioxide, methane, nitrous oxide, and ozone.The three major constituents of air, and therefore of Earth's atmosphere, are nitrogen, oxygen, and argon.Water vapor accounts for roughly 0.25% of the atmosphere by mass.Air content and atmospheric pressure vary at different layers, and air suitable for use in photosynthesis by terrestrial plants and breathing of terrestrial animals is found only in Earth's troposphere and in artificial atmospheres.The atmosphere has a mass of about 5.15 three quarters of which is within about 11 km (6.8 mi; 36,000 ft) of the surface.Layers drawn to scale, objects within the layers are not to scale.