exosphere


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ex·o·sphere

 (ĕk′sō-sfîr′)
n.
1. The outermost region of a planet's atmosphere.
2. The outermost region of the earth's atmosphere, lying above the thermosphere and extending thousands of kilometers into space, from which molecules having sufficient velocity can escape the earth's gravitation.

ex′o·spher′ic (-sfîr′ĭk, -sfĕr′-) adj.

exosphere

(ˈɛksəʊˌsfɪə)
n
(Physical Geography) the outermost layer of the earth's atmosphere. It extends from about 400 km above the earth's surface

ex•o•sphere

(ˈɛk soʊˌsfɪər)

n.
the highest region of the atmosphere.
[1950–55]
ex`o•spher′ic (-ˈsfɛr ɪk, -ˈsfɪər-) adj.

ex·o·sphere

(ĕk′sō-sfîr′)
The outermost region of the Earth's atmosphere, lying beyond the ionosphere and extending indefinitely into space. The air in the exosphere gets thinner and thinner until the lightest particles, such as hydrogen atoms, begin to escape Earth's gravity.

exosphere

the highest portion of the earth’s atmosphere, from which air molecules can escape into space. Cf. ionosphere.
See also: Atmosphere

exosphere

The outermost layer of the atmosphere of a planet.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.exosphere - the outermost atmospheric layer
layer - a relatively thin sheetlike expanse or region lying over or under another
atmosphere - the envelope of gases surrounding any celestial body
Translations
exosphère
References in periodicals archive ?
The 3,290 kg Chndrayaan-2 will orbit around the moon and study its lunar conditions to collect data on its topography, mineralogy, exosphere and the"presence"of water ice and hydroxyl.
Investigations of the exosphere could ultimately provide new clues to how atmospheres change over geological time-scales on various planets including Earth, Mierkiewicz noted.
And recent research, using data from a NASA spacecraft, has shown the exosphere of the first rock from the sun could be affected by dust particles that slam into it during dawn.
Earth's exosphere consists mainly of hydrogen with traces of helium, carbon dioxide and atomic oxygen.
In 2015 NASA's Dawn spacecraft detected both a short-lived exosphere and a space weather "prequel": an uptick in energetic, charged particles arriving from the Sun.
His new string contains the likes of Hartnell, Exosphere, Astern and It's Somewhat.
The weather is crucial for Exosphere in the Princess Of Wales's on Thursday.
EXOSPHERE could bid to atone for his Royal Ascot flop in Thursday's Princess of Wales's at Newmarket.
NEWSBOY'S 1-2-3 1 EXOSPHERE 2 DARTMOUTH 3 BEAUTIFUL ROMANCE EXOSPHERE looks exactly the right type to give Sir Michael Stoute an incredible 10th Hardwicke Stakes victory.
40pm) with Exosphere and Dartmouth both holding big chances of enhancing their trainer's superb record in the race.
Exosphere is the 5/2 market leader at BetVictor but 10/1 is too big for a Group 1 winner in Simple Verse who gets the each way vote.
Exosphere (17-2) continued Sir Michael Stoute's excellent run in the Group 2 Jockey Club Stakes.