document updated 15 years ago, on Sep 11, 2008

unit	method	equivalent
AU		150,000,000 km
ly		63,000 AU
parsec		3.3 ly
z=	redshift	z has several things that have to be factored out before it can be used as a direct distance
km/s	redshift	68.8 - 71.4 mpc, 227 - 235 ly