convection level
James Webb Space Telescope
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Definition: convection: The transfer of heat from a region of high temperature to a region of lower temperature by the displacement of the cooler molecules by the warmer molecules.
Space Tragedies9 Planets in Nine DaysAstronomy 101 ...
Convection zone
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Convection cells can form at all scales. They can be millimeters across or larger than Earth. They all work the same way. The convection that students are most likely to have observed is in cumulonimbus clouds or "thunderheads.
The Ups and Downs of Convection
07.03.07
Mitch Rorris and Ryan Reinking float inside NASA's Weightless Wonder aircraft during one of many periods of reduced gravity. Image Credit: NASA ...
Convection: The organized flow of large groups of molecules based on their relative densities or temperatures. A hot fluid or gas will move upward, and a cooler liquid or gas will sink downward.. (go to first use in the text) ...
convection: Circulation of a fluid or gas.
corona: The Sun's outer atmosphere, with a temperature of greater than a million degrees, that gives rise to the solar wind.
Convection (magnetospheric)--large-scale plasma flow, circulating in the magnetosphere and driven by the solar wind. Plasma physics requires such circulation to be associated with an electric field.
convection
the transfer of heat energy by moving currents of material
core ...
Convection currents in air Hold a pinwheel above a candle or burner. The hot flame will set up convection currents in the air, causing the pinwheel to spin.
Convection- fluid circulation driven by large temperature gradients; the transfer of heat by this automatic circulation
Corona- the high-temperature outermost atmosphere of the sun, visible from Earth only during a total solar eclipse ...
Convection
the physical upwelling of hot matter, thus transporting energy from a lower, hotter region to a higher, cooler region. A bubble of gas that is hotter than its surroundings expands and rises.
Convection: Movements of mantle material, laterally or in upward-downward directions, due to heat variations.
Convection - The process of energy transport in which heat is carried by hot, rising and cool, falling currents or bubbles of liquid or gas
Convection Zone - The outer part of the Sun's interior in which convection occurs ...
convection: Circulation in a fluid driven by heat; hot material rises, and cool material sinks.
convective zone: The region inside a star where energy is carried outward as rising hot gas and sinking cool gas.
Convection zone
In the Sun's outer layer (down to approximately 70% of the solar radius), the solar plasma is not dense enough or hot enough to transfer the heat energy of the interior outward via radiation.
Convection in the most general terms refers to the movement of molecules within fluids . Convection is one of the major modes of heat transfer and mass transfer....
fan
Fan (mechanical) ...
CONVECTION - Transfer of heat energy by moving material. Temperatures increases with depth in planetary objects. Deep hot less-dense material physically rises and cools, releasing heat and becoming denser.
Convection
(a) Process in the Sun (and possibly other stars) perhaps caused by Solar rotation, which produces the immensely powerful electrical and magnetic fields associated with sunspots.
(b) The transfer of energy by flow of a liquid or gas.
The Convection Zone
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The convection zone is the outer-most layer of the solar interior. It extends from a depth of about 200,000 km right up to the visible surface.
Convection
Heat rises, while cooler gas falls. Have you ever noticed that your basement is always much cooler than upstairs. The same laws of physics apply within stars.
Convection Zone
The region below a star's surface where energy flows outward by the rising of hot gas known as convection.
Corona ...
Convection in the Martian interior seems to have been stifled 2 billion years ago by the planet's rapidly cooling and solidifying mantle.
Convection: A process of heat transfer in which hot material physically moves from a hot region to a cooler region (and cool material moves into the hot region).
convection zone Region of a star's interior, lying just below the surface, where the material of the star is in constant convective motion. This region extends into the solar interior to a depth of about 20,000km.
convection
The bulk transport of plasma (or gas) from one place to another, in response to mechanical forces (for example, viscous interaction with the solar wind) or electromagnetic forces.
Coordinated Universal Time (UTC) ...
CONVECTION
Convection is the transfer of heat by circulation through a gas or liquid.
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The convection cells may play an important role in the explanation of the mass-loss phenomenon that has seen the star steadily shrink by about 15 percent over the last 15 years, ...
Large convection currents in AGB stars carry material produced in the thin helium-burning shell up to the surface. These heavier nuclei are detected in the star's spectrum which thus provides an insight on what is happening deep within the star.
Cyclonic convection waves in a rotating fluid. Such waves occur in the atmosphere, in the oceans, and in the fluid core of the Earth. [H76]
Rosseland Mean Absorption Coefficient ...
Remember, convection is also the process you see when you boil a pot of water on the stove. Energy is transported by the motion of the material - the churning and bubbling of the gas.
In the Sun convection is also an important process. Convection becomes important whenever the opacity goes up and the rate of radiative diffusion becomes less. Then heat builds up and the boiling begins.
convection (NASA Thesaurus / NASA SP-7, 1965) 1. In general, mass motions within a fluid resulting in transport and mixing of the properties of that fluid. Compare conduction, radiation.
2.
autoconvection gradient = autoconvective lapse rate. autoconvective lapse rate The environmental lapse rate of temperature in an atmosphere in which the density is constant with height (homogenous atmosphere), equal to g/R, ...
convection zone the region of a star's interior where energy is transported outward using bulk motions of rising hot gas and sinking cool gas. For the Sun, it is the region above the radiative zone.
The mottled, orange peel, appearance of the Sun's surface; caused by convection within the Sun. H
Heliocentric.
Sun-centred. I
Inclination.
(1) The angle between the orbital plane of the orbit of a planet, and the ecliptic.
They are confined to the interior of the sun below the convection zone (which extends from 0.7-1.0 solar radii), and are practically inobservable at the surface.
" At the equator, it takes 25 days to make a turn, while at higher latitudes it takes closer to 30, the shearing gases coupled with convection helping to create solar magnetic fields and the solar activity that leads to terrestrial aurorae.
The transport can occur by either of two mechanisms: either the energy is carried by radiation, or it is carried by convection.
Since the only cause for these convection currents is the statical instability produced by radiation, and the rapid stifling of radiations within the body produces there a temperature gradient falling very slowly, ...
The Sun has several layers: the core, the radiation zone, the convection zone, and the photosphere (which is the surface of the Sun). In addition, there are two layers of gas above the photosphere called the chromosphere and the corona.
At various points in the liquid core, fluid is rising in cells driven by thermal convection. The rising fluid carries with it the toroidal magnetic field.
Convection currents create four on a rotating planet which are characterized by strong prograde flow near the surface at high latitudes and retrograde flow near the surface at low latitudes.
A dynamo requires three things: a conducting liquid, rotation, and convection. The core is thought to be electrically conductive, however.
Kierein justifies his model using the limb effect in solar spectral lines, which is normally attributed to convection: hot material rises and is brighter than the cool falling material, ...
The separation of elements is enabled by the slow spin and the relatively high temperature, and hence lack of convection. Separation happens because each ion has its own photoabsorption characteristics.
For example, between 30 degrees and 60 degrees North latitude the solar convection pattern would produce a prevailing surface wind from the South.
This pattern, known as the solar granulation, is caused by turbulence in the upper levels of the convection zone. Each granule is about 2000 km (about 1240 mi) across.
It is most often produced by convection layers rising at the surface of a reflecting mirror from heat inside the cooling glass, by air currents crawling along the sides of a closed telescope tube, ...
When combined with the rapid rotation that most brown dwarfs exhibit, convection sets up conditions for the development of a strong, tangled magnetic field near the surface. Astronomers believe that this magnetic field can create strong flares.
Thus, convection becomes the major method in bringing the energy to the solar surface.
Stability
At the beginning of the formation of a star, the gravitational attraction will pull the gas together.
Much information has also been collected about the Sun's convection zone - the outermost layer of the interior of the Sun.
by convection] to a region with a different density. If the fluid stratification is stable, the parcel will start to oscillate around the point where there is no net force. Since the fluid is a continuous medium, a traveling disturbance will result.
Convection in the Sun is demonstrated with Miso soup, the solar system is toured using scale model objects such as oranges and peas, and the habitable zone near the Sun is discussed using make-your-own ice cream and chocolate fondue.
Heat can be transferred from one place to another by three methods: conduction in solids, convection of fluids (liquids or gases), and radiation through anything that will allow radiation to pass.
They are caused by intense magnetic activity that inhibits convection and reduces the surface temperature. Sunspots appear dark on images of the Sun taken with filters because the filter significantly reduces the brightness of the Sun overall.
Supergranulation. A large-scale convection pattern, characteristic size of about 30,000 km (2 1/2 times the diameter of the Earth) with a lifetime of about one day.
The granulated, orange-peel like, appearance of the Sun originates from the photosphere. This texture is caused by the numerous convection cells within the underlying convection zone.
Granulation The "grains of rice" appearance of the Sun's surface, which results from convection cells within the Sun.
Graticule A system of parallel lines or crossed lines at the telescope's focal plane, used in micrometers.
convection zone
The region of the interior of the Sun which lies just below the surface. Hot material is brought up to the surface and cooler material flows down towards the centre in a constant cycle.
 See also: Solar, Temperature, Earth, Sun, Light
  
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