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Monday, March 14, 2011

Biggest Unit in the world??

Astronomical unit

                    An astronomical unit (abbreviated as AU, au or a.u.) is a unit of length equal to about 149,597,870.7 kilometres(92,955,807.27 miles) or approximately the mean Earth–Sun distance.
The symbol ua is recommended by the International Bureau of Weights and Measures,and the international standard ISO 80000, while au is recommended by the International Astronomical Union,and is more common in Anglosphere countries. In general, capital letters are only used for the symbols of units which are named after individual scientists, while au or a.u. can also mean atomic unit or even arbitrary unit; however, the use of AU to refer to the astronomical unit is widespread.The astronomical constant whose value is one astronomical unit is referred to as unit distance and given the symbol A. 

1 astronomical unit =
SI units
149.60×106 km  149.60×109 m

Caution!!! : Never think what's  outside Milky Way because mind goes blank :P