Albedo
Related Category: Astronomy: General
(lb´d), reflectivity of the surface of a planet, moon, asteroid, or other celestial body that does not shine by its own light.
Albedo
Albedo is a measurement of the amount of light reflected from the surface of a celestial object, such as a planet, satellite, comet or asteroid. The albedo is the ratio of the reflected light to the incident light:
and has values between: ...
albedo
A measure of the reflecting power of a nonluminous object, such as a planet, moon, or asteroid.
albedo
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Albedo is usually differentiated into two general types: normal albedo and bond albedo. The former, also called normal reflectance, is a measure of a surface's relative brightness when illuminated and observed vertically.
Visual albedo is defined by the "reflectivity of the surface of a planet, moon, asteroid, or other celestial body that does not shine by its own light.
Size and albedo. The most widely used technique for determining the sizes of asteroids is that of thermal radiometry.
Geometric albedo
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Albedo Feature
a dark or light marking on the surface of an object that may or may not be a geological or topographical feature. Albedo is the measure of the reflectivity of a planet, measured on a scale from zero to one.
albedo:
Measure of the reflectivity of the object. It is defined as the fraction of the received light that is reflected into space.
Albedo- the reflecting power of a non-luminous body; a perfect reflector would have an albedo of 100 per cent
Albedo feature- a dark or light marking on the surface of an object that may not be a geological or topographical feature ...
Albedo The proportion of incident light which a body reflects in all directions. The albedo of Earth is 0.36, that of the Moon is 0.07 and that of Uranus is 0.93.
Albedo The ratio of light reflected from a Solar System object to that received by it. (A complete reflection gives an albedo of 1.0 or 100%).
Albedo
Geometric albedo is the ratio of a body's brightness at zero phase angle to the brightness of a perfectly diffusing disk with the same position and apparent size as the body.
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albedo
The fraction of incoming light that is reflected by a celestial body. An albedo of one reflects all incoming light while an albedo of zero absorbs all light.
Albedo - The ratio of the light reflected in all directions by a surface to the light incident on it. A perfectly reflecting surface has an albedo of 1, a perfectly absorbing surface has an albedo of 0 ...
Albedo. The reflecting power of a planet or other non-luminous object. For example, the Moon is a poor reflector of light and its albedo is just 0.12. Albedo is typically expressed by a simple numerical factor, 1.0 means a perfect reflector, 0.
Albedo: The brightness of an object or surface; it is the percentage of incoming radiation (light) that the object or surface reflects.
albedo: The fraction of the light that hits an object that is reflected.
alt-azimuth mounting: A telescope mounting capable of motion parallel to and perpendicular to the horizon.
albedo
the percentage of light that an object reflects
altazimuth mount ...
ALBEDO - Ratio of the amount of light reflected by an object and the amount of incident light; used as a measure of the reflectivity or intrinsic brightness of an object (a white, perfectly reflecting surface would have an albedo of 1.
Albedo
(a) The ratio of the amount of light reflected from a surface to the amount of incident light.
(b) Ratio of the total flux reflected in all directions to the total incident flux. see Bond Albedo; Geometric Albedo
Alchemy ...
Ice-albedo feedback is a climate feedback process where a change in the area of snow-covered land, ice caps, glaciers and sea ice alters the albedo....
. When global temperatures increase, ice near the poles melts at an increasing rate.
Albedo Map of Umbriel
This image is an adaptation of a figure from an article by Paul Helfenstein, Peter C.Thomas and Joseph Veverka published in the March 23, 1989 issue of Nature.
Albedo Feature - Space and Astronomy Definition - Online Dictionary and Glo...
planetary nebula - Space and Astronomy Definition - Online Dictionary and G...
kilogram (kg) - Space and Astronomy Definition - Online Dictionary and Glos...
albedo
The ratio of the light reflected from an object divided by the light that hits the object. Albedo equals 0 for perfectly black and 1 for perfectly white.
Angstrom ...
albedo -- The ratio of the amount of solar radiation reflected from an object to the total amount incident upon it.
Alcott -- Louisa May Alcott (1832-1888) American author.
altimetry -- The measurement of elevation or altitude.
Albedo
The reflective property of a non-luminous object. A perfect mirror would have an albedo of 100% while a black hole would have an albedo of 0%.
albedo - (n.)
Fraction of incident electromagnetic radiation reflected by a body such as a planet, star, or cloud.
alpha particle - (n.) ...
Albedo features - areas of markedly different reflectivity
Dorsa - ridges (see List of ridges on Mercury)
Montes - mountains (see List of mountains on Mercury)
Planitiae - plains (see List of plains on Mercury) ...
- Albedo Feature - Space and Astronomy Definition - Online Dictionary and Glossary Definition of Albedo Feature
- Mauna Loa Volcano on the Big Island of Hawaii as seen from space in a NASA photo taken 09/93 - Hawaii Photo Gallery ...
The albedo distribution for asteroids with diameters less than 25 km is poorly known because only a small fraction of this population has been characterized.
It's albedo is only 4%. Furthermore, its surface color is very uniform despite the deep craters. This indicates that its interior is homogeneous, perhaps a pristine sample of the early solar system.
albedo surface reflectivity altitude the angular distance of an object above or below the horizon angstrom (Å) commonly used to measure the wavelength of light; ...
In fact, its albedo is less than 1.0, so the new object is likely to be larger than Pluto.Spitzer space telescope observations should provide an upper bound on the size of 2003 UB313.
Earth albedo (NASA Thesaurus) The fraction of the solar incident radiation that is reflected off the Earth and back into space.
A theory describing the distribution of atoms of partially ionized matter over possible excitation and ionization states, in the limit of low density (see Thomas-Fermi theory). [H76]
Bond Albedo ...
The rings have an albedo of 0.05; they do not reflect very much of the sunlight that they receive.
The dark Martian surface markings, called "maria" or "albedo features," were once thought by some astronomers to be great lakes, oceans, or vegetation, but space probes in the 1970's revealed them to be vast expanses of rock and dust.
Asteroids are classified according to their chemical composition, based on observed spectra and albedo (reflectivity). More than 75% are C-type asteroids which are dark and reddish with an albedo less than 0.10.
Although classified as carbonaceous, Ceres reflects roughly 10 percent of the sunlight that strikes it ("albedo") and so is not as dark as other low-density asteroids called carbonaceous chondrites, which have albedos of around three to five percent.
Notes: Surface gravity g is given in Earth gravities (1 gE = 9.803 m/s2); escape velocity is vesc; albedo is the percent of ALL of the Sun's energy hitting the planet that is reflected (100% would be perfect reflection); ...
Its albedo, or reflectivity, is high (84 percent of the light falling on it is reflected), but it is so far away from the earth its stellar magnitude (a scale used to describe the brightness of an astronomical object; ...
The albedo of the planet is high; 84 percent of the light falling on Neptune is reflected. The period of rotation is about 16 hr, and the period of revolution about the sun is 164.79 earth years. The average stellar magnitude of the planet is 7.
Reflected light, on the other hand, depends on the albedo (reflectivity) of features on the planet. For instance, the glint of blue oceans, or highly reflective stretches of ice, could be seen in reflected light.
This is perplexing, especially given that ice-albedo feedback models, which predict that the should be permanently locked in an ice age if it started out cold.
The blue icy plains show different levels of reflectivity, or albedo, because of differences in the size of the grains of the ice.
The image covers an area about 780 miles across. The resolution is about one to two miles per picture element.
There are three major characterizations of asteroids, which are determined by composition, albedo, and similarity to meteoric samples:
C-type - (carbonaceous)
S-type - (silicaceous)
M-type - (metalic) ...
These rings were discovered by NASA's Voyager 1 in 1980. The rings were investigated further when Voyager 2 flew by Jupiter. The rings have an albedo of 0.05; they do not reflect very much of the sunlight that they receive.
Assuming a reflectivity (or albedo) of 4 percent, 2001 KX76 has a diameter of approximately 1,270 kilometers, making it bigger than Ceres, the largest known asteroid. For comparison, Pluto's moon Charon has an estimated diameter of 1,200 kilometers.
 See also: Planet, Solar, Solar System, Telescope, Field
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