Exosphere From 500-1,000 km (310-620 mi; 1,600,000-3,300,000 ft) up to 10,000 km (6,200 mi; 33,000,000 ft), contain free-moving particles that may migrate into and out of the magnetosphere or the solar wind.
Exosphere. The outermost part of the Earth's atmosphere. It is an ill-defined, highly rareified zone which starts at a height of about 700km (435 miles) and extends into the vacuum of space.
Exosphere - The outer part of the thermosphere. Atoms and ions can escape from the exosphere directly into space ...
Exosphere - the the outermost layer of the Earth's atmosphere, where atmospheric pressure and temperature are low.
Ionosphere - the atmospheric layer between the mesosphere and the exosphere; it is part of the thermosphere.
EXOSPHERE
The exosphere is the outermost layer of the Earth's atmosphere. The exosphere goes from about 400 miles (640 km) high to about 800 miles (1,280 km).
An exosphere is a super-low-density atmosphere probably formed, in this case, from atoms sputtering off Mercury's surface. The sputtering may be caused by contact with hot plasma trapped in Mercury's magnetic field.
Even in the exosphere, the atmosphere is still present (as can be seen for example by the effects of atmospheric drag on satellites).
Exosat satellite (Imagine the Universe Dictionary - NASA GSFC) European Space Agency's X-ray Observatory exosphere (NASA Thesaurus / NASA SP-7, 1965) The outermost, or topmost, portion of the atmosphere.
Beyond that is the exosphere, where the atmosphere is so tenuous as to be space.
Highest points
Mt Everest 8848 m
Mt Everest south summit 8750 m
K2 8610 m
Kangchenjunga 8597 m
Lhotse 8511 m ...
region of escape = exosphere. register A device capable of retaining information, often that contained in a small subset (e.g., one word) of the aggregate information in a digital computer. See storage.
Mercury is surrounded by a thin envelope of gas - an exosphere - containing hydrogen, helium, oxygen, sodium, potassium, calcium and magnesium. These components are not stable on long timescales so each element must have a source.
The atmospheric layers are - in order of distance from sea level - the troposphere (10 km), stratosphere (45 km), mesosphere (80 km), thermosphere (200 km), and exosphere (400 km).
* exosphere â€" above the ionosphere, where the atmosphere thins out into space. This is the last major atmosphere. ("Exo" means "outside" in Greek.) ...
Mercury does has a very thin atmosphere (or more correctly exosphere). Processes such as vaporisation of rocks by impacts, evaporation of elements from rocks, sputtering by solar wind ions or diffusion from the planet's interior contribute to it.
The presence of an exosphere, as it is more properly called, was confirmed by instruments on the Cassini probe which orbits the ringed planet and its moons.
Finally MESSENGER will discover the composition of Mercury's outer atmosphere (exosphere) using an ultraviolet detector.
The thermosphere is the layer of the earth's atmosphere directly above the mesosphere and directly below the exosphere. Within this layer, ultraviolet radiation causes ionization....
Auroral heating can just barely account for the high temperature (750 K) of the Uranian exosphere.
The layers, troposphere, stratosphere, mesosphere, thermosphere, and the exosphere, vary around the globe and in response to seasonal changes.
The exosphere temperature was measured at 295-355 K, 10 K lower temperatures were found from 200 to 87 km. A small magnetic field was postulated, about .0003 Earth's.
The periapsis portion of the orbit will allow in-situ measurements of the thermosphere and lower exosphere and remote sensing of the lower atmosphere and surface.
exosphere
exposure age
extended source
extinction, interstellar
extragalactic background light (EBL)
extragalactic reference frame
Extrasolar Planet Observational Research Team (EXPORT)
extrasolar planets
extrasolar planets, detection ...
 See also: Atmosphere, Planet, Earth, Temperature, Solar
|
