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词汇 exosphere
释义

Definition of exosphere in English:

exosphere

nounˈɛksə(ʊ)sfɪəˈɛksoʊˌsfɪr
Astronomy
  • The outermost region of a planet's atmosphere.

    〔天文〕外大气圈,外逸层

    Example sentencesExamples
    • With around three hundred plus kilometers to go, we'll be in the exosphere, aka space, in no time at all.
    • Then more indicators flashed to life as the ship skimmed the outer exosphere at Mach 27.
    • Since collisions are negligible above the exobase, the molecules in this region, called the exosphere, move along ballistic trajectories under the action of the earth's gravitational field.
    • The anti-grav lifted the shuttle up into the exosphere, and then, after obtaining permission from Perimeter Traffic Control, the engines kicked in.
    • From the bottom of the exosphere the atmosphere has a thickness of 400 km.

Derivatives

  • exospheric

  • adjective
    Astronomy
    • He did not know how much time that his fleet had before the exospheric trap's consequences manifested.
      Example sentencesExamples
      • He has evaluated the escape flux averaged over an entire 11-year cycle of solar activity, using satellite data on exospheric temperature.

Definition of exosphere in US English:

exosphere

nounˈɛksoʊˌsfɪrˈeksōˌsfir
Astronomy
  • The outermost region of a planet's atmosphere.

    〔天文〕外大气圈,外逸层

    Example sentencesExamples
    • Then more indicators flashed to life as the ship skimmed the outer exosphere at Mach 27.
    • Since collisions are negligible above the exobase, the molecules in this region, called the exosphere, move along ballistic trajectories under the action of the earth's gravitational field.
    • The anti-grav lifted the shuttle up into the exosphere, and then, after obtaining permission from Perimeter Traffic Control, the engines kicked in.
    • From the bottom of the exosphere the atmosphere has a thickness of 400 km.
    • With around three hundred plus kilometers to go, we'll be in the exosphere, aka space, in no time at all.
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