exosphere
noun
environmentspecializeduk/ˈeks.əʊ.sfɪər/us/ˈeks.oʊ.sfɪr/[C]
thepartof a planet'satmospherethat isfarthestfrom theplanet:
What ishappeningin Mercury's exosphere?
An exosphere is theupperpartof anyplanetaryatmosphere, where thedensityofatomsis solowthat they don'tcollidewith each other.
the exosphere
[S]
thepartof the earth'satmospherethat isfarthestfrom theearth:
Thetemperatureat thebaseof the exosphere is about 1300 K.
Atoms ofhydrogen,helium,sodium,potassiumandcalciumhave beenseenin the exosphere.
See also
asthenosphere
theatmosphere
biosphere
hydrosphere
ionosphere
lithosphere
mesosphere
stratosphere
thermosphere
troposphere
- Thetopof the earth'satmospherehas an exosphere.
- Particles canloseenergyofmotionbycollidingwithsatellites,rings, or exospheres.
- Beyond these, the exospherethinsout into the magnetosphere.
- Therateofthermalescapedependson thetemperatureof the exosphere and on thegravitationalfield.
The Earth & outer space - general words
- ablate
- aeolian
- alluvium
- anti-gravity
- atmosphere
- auroral
- biosphere
- geo-
- geophysicist
- globe
- lithospheric
- mesosphere
- mesospheric
- microgravity
- multiverse
- the Big Bang
- the big bang theory
- the firmament
- underground
- universe