Editing Astronomical unit

An '''Astronomical Unit''' is the standard distance unit by which distances which are too great to be measured in kilometers, but too small to be measured in Light Years, are measured. One AU is the average distance between the Earth and the Sun.
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-The '''Astronomical Unit''' is used for distances which are too great to be measured in kilometers, but too small to be measured in Light Years. One AU is the mean distance between the Earth and the Sun. It is about 150 million kilometers, or 93 million miles.
+An '''Astronomical Unit''' is the standard distance unit by which distances which are too great to be measured in kilometers, but too small to be measured in Light Years, are measured. One AU is the average distance between the Earth and the Sun.
-Interesting article here [http://en.wikipedia.org/wiki/Astronomical_unit]
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-[[Category: Articles]]
-[[Category:Glossary]]