Definition: An Astronomical Unit is approximately the mean distance between the Earth and the Sun. It is a derived constant and used to indicate distances within the solar system.
neo.jpl.nasa.gov/glossary/au.html
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I want to learn how to calculate the astronomical unit. How can I calculate it? I don't know formula and I want to learn. ... The Astronomical Unit is the average distance between the Sun and Earth. Its value is 149,597,870 km (about 93 million miles).
imagine.gsfc.nasa.gov/docs/ask_astro/answers/980122b.ht... imagine.gsfc.nasa.gov/docs/ask_astro/answers/980122b.html
Astronomical unit - Wikipedia, the free encyclopedia
An astronomical unit (abbreviated as AU , au , a.u. , or sometimes ua ) is a unit of length roughly equal to the mean distance between the Earth and the Sun. It is approximately 150 million ...
en.wikipedia.org/wiki/Astronomical_unit
More on astronomical unit from Infoplease: ... astronomical unit: meaning and definitions - astronomical unit: Definition and Pronunciation ... Related content from HighBeam Research on: astronomical unit...
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On measuring the astronomical unit; part of an educational web site on astronomy, mechanics, and space ... If the mean distance of Earth from the Sun is 1 AU ("Astronomical Unit"), then that of Venus is 0.723 AU, of Mercury 0.387 AU and that of Mars is 1.524 AU. But how much is that in kilometers, or miles? In other words-
www-istp.gsfc.nasa.gov/stargaze/Sscale.htm
astronomical unit n. ( Abbr. AU ) A unit of length used in measuring astronomical distances within the solar system equal to the mean distance from ... By definition, the astronomical unit is dependent on the heliocentric gravitational constant, that is the product of the gravitational constant G and the solar mass...
www.answers.com/topic/astronomical-unit www.answers.com/topic/astronomical-unit
An Astronomical Unit (A.U.) is the average distance between Earth and the sun, which is about 93 million miles or 150 million kilometers. Astronomical units are usually used to measure distances within our solar system.
coolcosmos.ipac.caltech.edu/cosmic_kids/AskKids/def_au.... coolcosmos.ipac.caltech.edu/cosmic_kids/AskKids/def_au.shtml
a logarithmic unit used to measure optical density, the absorbance of light transmitted through a partially absorbing substance. If T is the percentage of light transmitted, then the absorbance is defined to be -log10 T absorbance units.
www.unc.edu/~rowlett/units/dictA.html www.unc.edu/~rowlett/units/dictA.html
What is the Astronomical Unit? Asked by: Saidi; Answer; When describing distances on the scale of our Solar System, conventional units of measure are not conveniently sized. Miles are too small, and light years are too large, to permit easily compared numbers.
www.physlink.com/ae238.cfm
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