Armstrong and Aldrin collected  of lunar material to bring back to Earth as pilot Michael Collins flew the Command Module Columbia in lunar orbit, and were on the Moon's surface for 21 hours, 36 minutes before lifting off to rejoin Columbia.
ˈɑːɹmstɹɔŋ ænd ˈɔːldɹɪn kəlˈɛktᵻd ʌv lˈuːnɚ mətˈɪɹiəl tə bɹˈɪŋ bˈæk tʊ ˈɜːθ æz pˈaɪlət mˈaɪkəl kˈɑːlᵻnz flˈuː ðə kəmˈænd mˈɑːdʒuːl kəlˈʌmbiə ɪn lˈuːnɚɹ ˈɔːɹbɪt, ænd wɜːɹ ɔnðə mˈuːnz sˈɜːfɪs fɔːɹ twˈɛnti wˈʌn ˈaʊɚz, θˈɜːɾi sˈɪks mˈɪnɪts bᵻfˌoːɹ lˈɪftɪŋ ˈɔf tə ɹᵻdʒˈɔɪn kəlˈʌmbiə.