▁These ▁units ▁describe ▁dimensions ▁which ▁are ▁not ▁and ▁cannot ▁be ▁covered ▁by ▁the ▁International ▁System ▁of ▁Units . ▁ ▁Beaut y : ▁Helen ▁ ▁Helen ▁of ▁T roy ▁( from ▁the ▁I li ad ) ▁is ▁widely ▁known ▁as ▁" the ▁face ▁that ▁launched ▁a ▁thousand ▁ships ". ▁ ▁Thus , ▁ 1   m illi hel en ▁is ▁the ▁amount ▁of ▁beauty ▁needed ▁to ▁launch ▁a ▁single ▁ship . ▁ ▁Other ▁derived ▁units ▁such ▁as ▁the ▁negative ▁hel en ▁( the ▁power ▁to ▁beach ▁ships ) ▁have ▁also ▁been ▁described . ▁ ▁Bog os ity : ▁Len at ▁The ▁unit ▁of ▁bog os ity , ▁i . e . ▁how ▁bog us ▁a ▁person , ▁claim , ▁or ▁proceed ing ▁is , ▁derived ▁from ▁the ▁fict ional ▁field ▁of ▁Quant um ▁Bog od ynam ics , ▁is ▁the ▁Len at . ▁The ▁Len at ▁is ▁s eld om ▁used , ▁as ▁it ▁is ▁understood ▁that ▁it ▁is ▁too ▁large ▁for ▁normal ▁conversation . ▁Its ▁most ▁common ▁form ▁is ▁the ▁micro Len at . ▁ ▁C ool ness : ▁M ega F on zie ▁A ▁M ega F on zie ▁is ▁a ▁fict ional ▁unit ▁of ▁measurement ▁of ▁an ▁object ' s ▁cool ness ▁invent ed ▁by ▁Professor ▁Far ns worth ▁in ▁the ▁Fut ur ama ▁episode , ▁" B ender ▁Should ▁Not ▁Be ▁All owed ▁on ▁TV ." ▁A ▁' F on zie ' ▁is ▁about ▁the ▁amount ▁of ▁cool ness ▁inher ent ▁in ▁the ▁Happy ▁Days ▁character ▁Fon zie . ▁