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Topic: Celestial body atmosphere


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In the News (Wed 22 Nov 17)

  
  Celestial body atmosphere - Wikipedia, the free encyclopedia
Atmosphere is the general name for a layer of gases that may surround a material body of sufficient mass.
Initial atmospheric makeup is generally related to the chemistry and temperature of the local solar nebula during planetary formation and the subsequent escape of interior gases.
Second, the distance from the sun determines the energy available to heat atmospheric gas to the point where its molecules' thermal motion exceed the planet's escape velocity, the speed at which gas molecules overcome a planet's gravitational grasp.
en.wikipedia.org /wiki/Celestial_body_atmosphere   (558 words)

  
 Calspace - Glossary of Terms -   (Site not responding. Last check: 2007-09-10)
Body capable of absorbing energy of all wavelengths falling on it; it is also capable of radiating all frequencies in a particular ratio to its absorbing properties.
Celestial latitude, measured in degrees north or south of the celestial equator.
An intersection of the ecliptic and the celestial equator.
calspace.ucsd.edu /virtualmuseum/Glossary_Astro/gloss_a-f.shtml   (4109 words)

  
 atmosphere. The Columbia Encyclopedia, Sixth Edition. 2001-05
Although some details about the atmospheres of other planets and satellites are known, only the earth’s atmosphere has been well studied, the science of which is called meteorology.
The earth’s atmosphere is composed of distinct layers.
The earth’s atmosphere is the environment for most of its biological activity and exerts a considerable influence on the ocean and lake environment (see biosphere).
www.bartleby.com /65/at/atmosphe.html   (842 words)

  
 SailNet Articles   (Site not responding. Last check: 2007-09-10)
At sea, the celestial horizon is parallel to the observer's horizon, or the visible horizon from your eye to where the sky meets the ocean.
A celestial LOP is actually a circle on the earth's surface plotted from the body's subpoint with a radius equal to the distance from the observer to that subpoint.
The angular distance from the body to the observer's zenith is called the co-altitude and, of course, is equal to 90 degrees minus the observed altitude (Ho).
www.sailnet.com /collections/articles/index.cfm?articleid=sexton0072   (1898 words)

  
 The Technology of Space Travel
If, however, a similar atmosphere is absent, then the landing is possible only by reaction braking, that is, by operating the propulsion system opposite to the direction of free fall during landing (Figure 37).
To implement this in accordance with the laws of celestial mechanics, the original orbital movement would have to be accelerated if the vehicle (according to the position of the target body) is to move away from the sun (Figure 98), and to be decelerated if it is to approach it.
As determined mathematically by Hohmann, the propellant expenditure reaches a minimum when the orbits of the original celestial body and that of the destination body are not intersected by the transfer orbit of the vehicle, but are tangential to it (touch it) (Figure 99).
www.hq.nasa.gov /pao/History/SP-4026/noord56.html   (772 words)

  
 atmosphere
[n] the mass of air surrounding the Earth; "there was great heat as the comet entered the atmosphere"; "it was exposed to the air".
[n] the weather or climate at some place; "the atmosphere was thick with fog".
[n] a distinctive but intangible quality surrounding a person or thing: "an air of mystery"; "the house had a neglected air"; "an atmosphere of defeat pervaded the candidate's headquarters"; "the place had an aura of romance".
lookwayup.com /lwu.exe/lwu/d?s=f&w=atmosphere   (144 words)

  
 ESC 400 Astronomy Lesson Plans
Solar system:  The sun and the group of celestial bodies that are held by its attraction and revolve around it.
After teaching about the positions, motions, and distances of the celestial objects in our solar system, I think it would be a good time to go more in depth of the planetary profiles.
Atmosphere:  A gaseous mass surrounding a celestial body.
www.cst.cmich.edu /users/kiefe1we/wolsc1mp/pub_html/Astronomy.htm   (973 words)

  
 atmosphere on Encyclopedia.com
ATMOSPHERE [atmosphere] [Gr.,=sphere of air], the mixture of gases surrounding a celestial body with sufficient gravity to maintain it.
The first 40 to 50 mi (64-80 km) above the earth contains 99% of the total mass of the earth's atmosphere and is generally of a uniform composition, except for a high concentration of ozone, known as the ozone layer, at 12-30 mi (19-50 km).
Depressed atmosphere; the Socialists have received only 17.59% of the votes and no seats in Parliament during the first round of legislative elections.
www.encyclopedia.com /html/a1/atmosphe.asp   (1391 words)

  
 Nat' Academies Press, Exploring the Trans-Neptunian Solar System (1998)
O Occultation —The obscuration of one celestial body by another of greater apparent diameter, as occurs, for instance, in the passage of an asteroid or comet in front of a star.
R Radiogenic heating —Heating of a celestial body due to the decay of radioactive isotopes.
Tidal heating —The internal heating of a planetary body due to friction caused by the differential gravitational effect of an external body on the mass in question.
www.nap.edu /books/0309060419/html/46.html   (1623 words)

  
 :: NASA Quest > Archives ::   (Site not responding. Last check: 2007-09-10)
An hour circle moves with the body as the celestial sphere rotates, unlike the celestial meridian of a point that remains fixed.
a celestial coordinate; it is the angular distance measured from the vernal equinox eastward along the celestial equator to the
It can be defined also as the arc of the celestial equator or the angle at the celestial pole between the hour circle of the vernal equinox and the hour circle of the body.
quest.arc.nasa.gov /mars/background/glossary.html   (1360 words)

  
 atmosphere
atmosphere [Gr.,=sphere of air], the mixture of gases surrounding a celestial body with sufficient gravity to maintain it.
atmosphere: Role of the Earth's Atmosphere - Role of the Earth's Atmosphere The earth's atmosphere is the environment for most of its biological...
atmosphere: Layers of the Earth's Atmosphere - Layers of the Earth's Atmosphere The earth's atmosphere is composed of distinct layers.
www.factmonster.com /ce6/sci/A0805225.html   (156 words)

  
 NAMN Guide: Appendix E - Glossary
The intensity and duration depends on the meteoroid's atmospheric entry velocity, its size, and its composition.
RADIANT - the point where the backward prolongation of the meteor trajectory intersect the celestial sphere, or the backwards prolongation of the apparent trails of a given meteor as seen by observers at different locations.
ZENITH ATTRACTION - the effect of the Earth's gravity on a meteoric body increasing the velocity and moving the radiant toward the zenith.
www.namnmeteors.org /appendixE.html   (697 words)

  
 A
Aerodynamics is also used in designing automobile bodies and trains for minimum drag and in computing wind stresses on bridges, buildings, and the like.
The Archimedes' principle states that a body immersed in a fluid is buoyed up by a force equal to the weight of the displaced fluid.
The envelope of air surrounding the earth; also, the body of gases surrounding or comprising any planet or other celestial body.
www.hydrocut.com /Terms/A.html   (4672 words)

  
 Great Red Spot - Psychology Central   (Site not responding. Last check: 2007-09-10)
Storms such as this are not uncommon within the turbulent atmospheres of gas giants.
Several factors may be responsible for its longevity, such as the fact that it never encounters solid surfaces over which to dissipate its energy and that its motion is driven by Jupiter's internal heat.
The Great Dark Spot may have been an atmospheric hole rather than a storm, and it is no longer present as of 1994 (although a similar spot had appeared farther to the north).
psychcentral.com /psypsych/Great_Red_Spot   (896 words)

  
 Glossary
The slowing of an object by the atmosphere of a celestial body.
Different albedos and emissivities of gases in the planet's atmosphere cause the radiation entering the atmosphere to be converted to infrared wavelengths to which the atmosphere is opaque, preventing re-radiation.
The obliquity of the ecliptic is the angle between the planes of the celestial equator and the ecliptic.
www.mira.org /fts0/glossx.htm   (5207 words)

  
 Determining Coaltitude   (Site not responding. Last check: 2007-09-10)
apparent displacement of a body on the celestial sphere
the apparent displacement of a body on the celestial
temperature of 70° is 10.26 mils; refraction of a body
www.tpub.com /content/USMC/mcr3161a/css/mcr3161a_181.htm   (310 words)

  
 Glossary   (Site not responding. Last check: 2007-09-10)
The total or partial blocking of light from a celestial body caused by its passing into the shadow of another body (as in a lunar eclipse), or the hiding of one celestial body by another (as in a solar eclipse).
A solid body in orbit about the Sun, much smaller than an asteroid and usually weighing less than about 100 kilograms.
The process by which heavier atomic nuclei are built from lighter ones, releasing great amounts of energy in the process.
www.geocities.com /CapeCanaveral/Launchpad/1364/Glossary.html   (501 words)

  
 The Atmosphere
In addition to absorbing much light, our atmosphere bends light rays entering at a slant (for a given observer) so that the true position of a star close to the horizon is not what it seems to be.
The upper limit of the atmosphere is usually given as 120 mi (192 km); no definitive figure is possible, since there is no boundary line between the incredibly attenuated gases 120 mi (192 km) up and space.
atmosphere - atmosphere [Gr.,=sphere of air], the mixture of gases surrounding a celestial body with sufficient...
www.infoplease.com /ipa/A0004508.html   (434 words)

  
 Jerry Hicks
Atmosphere - The gaseous envelope of a celestial body.
atmosphere, and that is used for oxidizing, bleaching, disinfecting, and deodorizing.
Albedo - The fraction of incident radiation that is reflected by a surface or body.
geosciences.ou.edu /~jhicks/lab_folder/lab2.html   (377 words)

  
 Glossary
Celestial sphere -- An immense sphere surrounding Earth, to which the fixed stars seen at night appear to be attached.
Convection in the atmosphere carries heat from the sun-warmed ground to higher layers, where it is radiated away into space; the lower levels do not radiate efficiently because of the greenhouse effect.
A (small) body subject to a force accelerates; the acceleration is in the direction of the force and proportional to its magnitude, and inversely proportional to the mass of the body: F = ma.
www-spof.gsfc.nasa.gov /stargaze/Sgloss.htm   (14613 words)

  
 The Nine Planets Glossary
If one of the bodies is sufficiently massive compared with the other two, then the triangular configuration is apparently stable.
Bodies at such points are sometimes referred to as Trojans.
The degree of brightness of a celestial body designated on a numerical scale, on which the brightest star has magnitude -1.4 and the faintest visible star has magnitude 6, with the scale rule such that a decrease of one unit represents an increase in apparent brightness by a factor of 2.512.
www.nineplanets.org /help.html   (4842 words)

  
 Untitled   (Site not responding. Last check: 2007-09-10)
The atmosphere of a celestial body is the gaseous material that surrounds it.
The Earth's atmosphere is divided into four major layers based upon measurable trends in temperature.
Moisture is supplied to the atmosphere from many sources, and it is expressed in such forms as clouds and the various types of precipitation such as rain and snow.
www.uncfsu.edu /msec/nova/timmod2.htm   (238 words)

  
 Human Space Exploration
In particular, the geology, the atmosphere, the planetary environment (radiation and meteoroids), and the magnetosphere of the celestial body will be studied in detail.
Once the available resources of the celestial body are known, missions will be sent to test new extraction, processing, and storage technologies.
Finally, the last step before humans can safely live on the celestial body is the establishment of the basic infrastructure required for human survival in the early stages of settlement.
pluto.spaceports.com /~helmut/exploration99/strategy1/2_4_1_robotic_missions.html   (450 words)

  
 Process   (Site not responding. Last check: 2007-09-10)
Meteorologist: It is the meteorologist’s job to observe the atmosphere, climate and weather of their celestial body.
Geologist: It is the geologist’s job to observe the composition of their celestial body.
They need to determine if structures could be built on their celestial body’s land.
www.smcm.edu /users/mdsimmers/summerEPort/Assets/SPACEwebquest/process.htm   (288 words)

  
 Atmosphere - Wikipedia, the free encyclopedia
Look up atmosphere in Wiktionary, the free dictionary.
Adobe Atmosphere, a 3D computer graphics product by Adobe Systems
This is a disambiguation page: a list of articles associated with the same title.
en.wikipedia.org /wiki/Atmosphere   (91 words)

  
 Science Bulletins | Astro | Feature | Impact! Tracking Near-Earth Asteroids | Glossary
A body in space that is smaller than an asteroid and at least as large as a speck of dust.
The path of one celestial body moving around another under the force of gravity.
A slight disturbance in the orbit of one celestial body around another caused by the gravitational attraction of a third body.
sciencebulletins.amnh.org /astro/f/nea.20050504/glossary/index.php   (1024 words)

  
 Implementation   (Site not responding. Last check: 2007-09-10)
You should do research individually on the aspects of your celestial body that fit your role in the group.
If your celestial body is not appropriate for colonization, create an argument as to why your celestial body may still be important for the future colonies (i.e.
Regarding the Celestial Bodies Worksheet, we have posted both a word document and a pdf file.
www.smcm.edu /Users/mdsimmers/summerEPort/Assets/SPACEwebquest/t-process.htm   (800 words)

  
 Aeroassist   (Site not responding. Last check: 2007-09-10)
Aerogravity assist is similar to the principle of gravity assist in that it uses the gravitational fields of large celestial bodies to alter the direction and magnitude of a spacecraft's velocity vector.
However, aerogravity assist also utilizes the drag forces applied to a spacecraft as it travels through or close to a celestial body's atmosphere to alter a spacecraft's trajectory.
The waverider spacecraft boasts a unique design that uses the shock wave produced by traveling at speeds higher than the speed of sound as a cushion attached to the leading edges of the craft.
www.engineering.usu.edu /mae/faculty/tmosher/aeroassist.html   (206 words)

  
 SPACE.com -- Titan's Methane Not Produced by Life, Scientists Say
More than a week after the Huygens probe plunged through Titan's atmosphere, researchers continue to pore over data collected for clues to how the only celestial body known to have a significant atmosphere other than Earth came to be and whether it can provide clues to how life arose here.
Images snapped by the 340-kilogram (750-pound) probe as it parachuted through Titan's atmosphere from the Cassini orbiter show the moon's surface was cut by a weather system leaving deep river beds and large reservoirs, implying activity by liquid methane.
But unlike water in the Earth's atmosphere that continually renews itself, methane is destroyed by ultraviolet light, so Titan must have a source deep inside, scientists said.
www.space.com /scienceastronomy/ap_huygens_update_050127.html   (613 words)

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