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Albedo

Albedo

He albedo It is the relationship between the intensity of the reflected light and the incident by a celestial body that does not emit its own light.

It is measured with a number between 0 and 1, after it has been established that 0 is the albedo of a body that does not reflect any light and 1 is the albedo of a body that reflects all the incident light. 0.5, for example, is the albedo of a celestial object that reflects 50 percent of the light received.

The albedo of a planet or a satellite varies, obviously, from one area to another depending on the nature of its surface. The planet with the highest albedo in our System is Venus, with 0.65, then there is Jupiter with 0.52 and third Neptune, with 0.41. The Earth has an albedo of 0.37. The albedo of the Moon is .08 or 8%. When we look at the Moon at night, we are only seeing 8% of the total energy that the Sun gives it. The reddish and moderately bright asteroids have an albedo that varies between 10% and 25%, while the dark asteroids They have less than 10%. The albedo of interstellar dust particles is approximately 50%.

Dark surfaces absorb more energy and light surfaces reflect it. There are not many surfaces with an albedo of (zero) 0. The Sun has an albedo very close to (zero) 0, and this is why scientists often refer to it as a dark body.


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