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Thursday, 16 November 2006 01:00 |
An atmosphere is the 500 km thick Layer of air surrounding the earth which supports the existence of all flora and fauna.
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An Atmosphere is the mixture of gases surrounding the Earth. The Earth's Atmosphere consists of about 79.1\% nitrogen (by volume), 20.9\% oxygen, 0.036\% carbon dioxide and trace amounts of other gases. The Atmosphere can be divided into a number of layers according to its mixing or chemical characteristics, generally determined by its thermal properties (temperature). The layer nearest the Earth is the troposphere, which reaches up to an altitude of about 8 km (about 5 miles) in the polar regions and up to 17 km (nearly 11 miles) above the equator. The stratosphere, which reaches to an altitude of about 50 km (31 miles) lies atop the troposphere. The mesosphere which extends up to 80-90 km is atop the stratosphere, and finally, the thermosphere, or ionosphere, gradually diminishes and forms a fuzzy border with outer space. There is relatively little mixing of gases between layers.
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Atmosphere is the whole mass of air surrounding the earth. See stratosphere, troposphere. Flickr PhotosThese pictures about "atmosphere" have been delivered by flickr on a random basis. We have no influence on it.
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NGC 3079 (A spiral galaxy about 55 million light years from Earth.)by Smithsonian InstitutionDescription: Chandra's X-ray image (blue) combined with Hubble's optical image (red and green) reveal towering filaments of warm (about ten thousand degrees Celsius) and hot (about ten million degrees Celsius) gas that blend to create the bright horseshoe-shaped feature near the center. This feature is thought to have been formed when a superwind of hot gas collided with cold gas in the galactic disk. The full extent of the superwind shows up as a fainter conical cloud of X-ray emission s . . . |
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