What does exosphere mean?
Definitions for exosphere
ˈɛk soʊˌsfɪərex·o·spher·e
This dictionary definitions page includes all the possible meanings, example usage and translations of the word exosphere.
Princeton's WordNet
exospherenoun
the outermost atmospheric layer
Wiktionary
exospherenoun
the uppermost layer of a planet's atmosphere
exospherenoun
an extremely thin atmosphere, as on Saturn's moon Dione
Wikipedia
Exosphere
The exosphere (Ancient Greek: ἔξω éxō "outside, external, beyond", Ancient Greek: σφαῖρα sphaĩra "sphere") is a thin, atmosphere-like volume surrounding a planet or natural satellite where molecules are gravitationally bound to that body, but where the density is so low that the molecules are essentially collision-less. In the case of bodies with substantial atmospheres, such as Earth's atmosphere, the exosphere is the uppermost layer, where the atmosphere thins out and merges with outer space. It is located directly above the thermosphere. Very little is known about it due to a lack of research. Mercury, the Moon, Ceres, Europa, and Ganymede have surface boundary exospheres, which are exospheres without a denser atmosphere underneath. The Earth's exosphere is mostly hydrogen and helium, with some heavier atoms and molecules near the base.
ChatGPT
exosphere
The exosphere is the outermost layer of Earth's atmosphere, located above the thermosphere. It is primarily composed of extremely low densities of hydrogen, helium, and other particles, where they can escape into space. It's the boundary between Earth's atmosphere and outer space. The exact height varies, but it starts roughly around 500 to 1,000 kilometers above Earth's surface and extends up to 10,000 kilometers or more. At this height, the particles are so spread out that they rarely collide with each other, and the temperature can vary greatly. The exosphere is also the layer where Earth's weather satellites orbit.
Wikidata
Exosphere
The exosphere is a thin, atmosphere-like volume surrounding a planetary body where molecules are gravitationally bound to that body, but where the density is too low for them to behave as a gas by colliding with each other. In the case of bodies with substantial atmospheres, such as the Earth's atmosphere, the exosphere is the uppermost layer, where the atmosphere thins out and merges with interplanetary space. It is located directly above the Thermosphere. Several moons, such as Earth's moon and the Galilean satellites, have exospheres without a denser atmosphere underneath. Here molecules are ejected from surface rocks and follow independent parabolic trajectories until they collide with the surface. Authors differ as to whether such moons are considered to have atmospheres or not. Smaller bodies such as asteroids, in which the molecules emitted from the surface escape to space, are not considered to have exospheres.
Matched Categories
Numerology
Chaldean Numerology
The numerical value of exosphere in Chaldean Numerology is: 9
Pythagorean Numerology
The numerical value of exosphere in Pythagorean Numerology is: 7
Translations for exosphere
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"exosphere." Definitions.net. STANDS4 LLC, 2024. Web. 17 Apr. 2024. <https://www.definitions.net/definition/exosphere>.
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