Astronomical unit
Revision as of 21:32, 28 November 2007 by 209.119.40.81 (talk)
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.
Interesting article here [1]