ɐpˈɑːloʊ ɪlˈɛvən ˈæstɹənˌɔːt mˈaɪkəl kˈɑːlᵻnz sˈɛd, "ˈeɪts moʊmˈɛntəs hɪstˈɔːɹɪk sɪɡnˈɪfɪkəns wʌz fˈɔːɹmoʊst"; wˌaɪl spˈeɪs hɪstˈoːɹiən ɹˈɑːbɚt kˈeɪ. pˈuːl sˈɔː ɐpˈɑːloʊ ˈeɪt æz ðə mˈoʊst hɪstˈɔːɹɪkli sɪɡnˈɪfɪkənt ʌv ˈɔːl ðɪ ɐpˈɑːloʊ mˈɪʃənz.
Apollo 11 astronaut Michael Collins said, "Eight's momentous historic significance was foremost"; while space historian Robert K. Poole saw Apollo8 as the most historically significant of all the Apollo missions.