gigaparsec Gpc Gpc 1.0 Gpc (3.3 Gly)
megaparsec Mpc Mpc 1.0 Mpc (3.3 Mly)
kiloparsec kpc kpc 1.0 kpc (3.3 kly)
parsec pc (parsec) pc 1.0 pc (3.3 ly)
gigalight-year Gly Gly 1.0 Gly (310 Mpc)
megalight-year Mly Mly 1.0 Mly (310 kpc)
kilolight-year kly kly 1.0 kly (310 pc)
light-year ly ly 1.0 ly (63,000 AU)
astronomical unit AU AU 1.0 AU (150,000,000 км; 93,000,000 mi)