An astronomical unit -LRB- abbreviated as AU , au , a.u. , or sometimes ua -RRB- is a unit of length roughly equal to the mean distance between the LOCATION@1 and the MISC@1 .

The astronomical unit -LRB- AU or au or a.u. or sometimes ua -RRB- is a unit of length about the same as the distance from the center of the LOCATION@1 to the centre of the Sun .
