▁a ▁unit ▁of ▁z odia cal ▁dust . ▁▁ ▁One ▁z odi ▁is ▁the ▁amount ▁of ▁inter plan et ary ▁dust ▁in ▁the ▁inner ▁solar ▁system . ▁ ▁This ▁dust ▁absor bs ▁light ▁from ▁the ▁Sun ▁and ▁re - rad i ates ▁it ▁as ▁thermal ▁radiation . ▁ ▁The ▁lum inos ity ▁of ▁the ▁z odia cal ▁dust ▁in ▁the ▁Sol ar ▁System ▁is ▁about ▁ ▁relative ▁to ▁the ▁lum inos ity ▁of ▁the ▁Sun , ▁and ▁in ▁practice , ▁this ▁is ▁the ▁observable ▁characteristic ▁defining ▁one ▁z odi . ▁ ▁References ▁ ▁Category : Un its ▁of ▁density ▁Category : Un its ▁of ▁measurement ▁in ▁astronom y <0x0A> </s> ▁US C GC ▁Rel iance ▁( W ME C - 6 1 5 ) ▁is ▁a ▁United ▁States ▁Coast ▁Guard ▁medium ▁end urance ▁cut ter . ▁She ▁is ▁the ▁first ▁of ▁the ▁ 2 1 0 ' ▁Med ium ▁End urance ▁C utter ▁Fle et ▁and ▁the ▁fourth ▁Re venue ▁C utter ▁/ ▁Coast ▁Guard ▁C utter ▁to ▁bear ▁the ▁name ▁Rel iance . ▁Con struct ed ▁by ▁Tod d ▁Sh ip y ards ▁in ▁Houston , ▁Texas ▁and ▁commission ed ▁in ▁ 1 9 6 4 , ▁she ▁was ▁originally ▁home port ed ▁in ▁Cor pus ▁Christ i , ▁Texas . ▁Her ▁duties ▁included ▁off sh ore ▁oil ▁rig ▁ins pe ctions , ▁fish eries , ▁counter ▁drug , ▁al ien ▁migr ant ▁inter diction , ▁marine ▁poll ution ▁pat rol s , ▁and ▁search ▁and ▁rescue . ▁Rel iance ▁has ▁been