An obscure unit of velocity - attoparsecs per microfortnight (25 feb 11)
A parsec is an astronomical unit, approximately 3.26 light years
A fortnight is two weeks
An attoparsec is 10 -18 parsecs
A microfortnight is a millionth of two weeks
'Attoparsecs per microfortnight' is about one inch per second:
In Ruby, to convert attoparsecs per microfortnight into inches per second, multiply by:
( ((1.9174 * 10**13)* 10**-18) * (12*3*1760) ) / ( (60*60*24*14) / 1000000.0 )
http://en.wikipedia.org/wiki/List_of_unusual_units_of_measurement