Changes

The astronomical unit ([[AU]]) is the mean [[Sun]]-[[Earth]] distance, a unit of distance widely used in expressing distances in the solar system. 1 AU = 149,597,870.691 km<ref>[http://www.iau.org/public/measuring/ The IAU and astronomical units] - International Astronomical Union site</ref>, or approximately 93 million miles. <!-- which mile? landmine, nautical mile, roman mile? //-->

The astronomical unit is a unit of measurement equivalent to ([[AU]]) the mean distancce between the [[Sun]] and [[Earth]]. The AU is used widely in expressing distances in the solar system. 1 AU = 149,597,870.691 km<ref>[http://www.iau.org/public/measuring/ The IAU and astronomical units] - International Astronomical Union site</ref>, or approximately 93 million miles. <!-- which mile? landmine, nautical mile, roman mile? //-->

== References ==

== References ==