The first known formal use of the term astronautics in the scientific community was the establishment of the annual International Astronautical Congress in 1950, and the subsequent founding of the International Astronautical Federation the following year.
ðə fˈɜːst nˈoʊn fˈɔːɹməl jˈuːs ʌvðə tˈɜːm ˌæstɹənˈɔːɾɪks ɪnðə saɪəntˈɪfɪk kəmjˈuːnᵻɾi wʌzðɪ ɪstˈæblɪʃmənt ʌvðɪ ˈænjuːəl ˌɪntɚnˈæʃənəl ˌæstɹənˈɔːɾɪkəl kˈɑːŋɡɹəs ɪn nˈaɪntiːnhˈʌndɹɪd fˈɪfti, ænd ðə sˈʌbsᵻkwənt fˈaʊndɪŋ ʌvðɪ ˌɪntɚnˈæʃənəl ˌæstɹənˈɔːɾɪkəl fˌɛdɚɹˈeɪʃən ðə fˈɑːloʊɪŋ jˈɪɹ.