▁their ▁membership . ▁The ▁I AU ▁has ▁its ▁head ▁office ▁on ▁the ▁second ▁floor ▁of ▁the ▁Institut ▁d ' A st ro phys ique ▁de ▁Paris ▁in ▁the ▁ 1 4 th ▁arr ondissement ▁of ▁Paris . ▁▁ ▁This ▁organisation ▁has ▁many ▁working ▁groups . ▁For ▁example , ▁the ▁Working ▁Group ▁for ▁Planet ary ▁System ▁N omen cl ature ▁( W G PS N ), ▁which ▁maintain s ▁the ▁astronom ical ▁naming ▁convent ions ▁and ▁planet ary ▁nom en cl ature ▁for ▁planet ary ▁bodies , ▁and ▁the ▁Working ▁Group ▁on ▁Star ▁Names ▁( W GS N ), ▁which ▁catalog s ▁and ▁standard izes ▁proper ▁names ▁for ▁stars . ▁The ▁I AU ▁is ▁also ▁responsible ▁for ▁the ▁system ▁of ▁astronom ical ▁tele gram s ▁which ▁are ▁produced ▁and ▁distributed ▁on ▁its ▁beh alf ▁by ▁the ▁Central ▁Bureau ▁for ▁Astronom ical ▁Tele gram s . ▁The ▁Minor ▁Planet ▁Center ▁also ▁oper ates ▁under ▁the ▁I AU , ▁and ▁is ▁a ▁" clear ing house " ▁for ▁all ▁non - plan et ary ▁or ▁non - mo on ▁bodies ▁in ▁the ▁Sol ar ▁System . ▁ ▁History ▁ ▁The ▁I AU ▁was ▁founded ▁on ▁ 2 8 ▁July ▁ 1 9 1 9 , ▁at ▁the ▁Const it utive ▁Assembly ▁of ▁the ▁International ▁Research ▁Council ▁( now ▁the ▁International ▁Science ▁Council ) ▁held ▁in ▁Br uss els , ▁Belg ium . ▁Two ▁subs idi aries ▁of ▁the ▁I AU ▁were ▁also ▁created ▁at ▁this ▁assembly : ▁the ▁International ▁Time ▁Commission ▁se ated ▁at ▁the ▁International