January 2009
World Book Science Dataset;1/1/2009, p1
Reference Entry
Albedo, in astronomy, the reflecting power of a celestial body that is not self-luminous. Albedo is stated as a decimal fraction between 1 and 0. An albedo of almost 1 indicates a bright surface that reflects most of the light that strikes it. An object with an albedo of almost 0 would absorb most of the light that struck it; little light would be reflected. The moon, for example, with an albedo of 0.07, reflects only 7 per cent of the sunlight it receives. Albedo is determined by calculating the amount of light that strikes the body and then measuring the reflected light.


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