The Apollo spacecraft had three parts: a command module (CM) with a cabin for the three astronauts, the only part that returned to Earth; a service module (SM), which supported the command module with propulsion, electrical power, oxygen, and water; and a lunar module (LM) that had two stages—a descent stage for landing on the Moon and an ascent stage to place the astronauts back into lunar orbit.
ðɪ ɐpˈɑːloʊ spˈeɪskɹæft hæd θɹˈiː pˈɑːɹts: ɐ kəmˈænd mˈɑːdʒuːl sˌiːˈɛm wɪð ɐ kˈæbɪn fɚðə θɹˈiː ˈæstɹənˌɔːts, ðɪ ˈoʊnli pˈɑːɹt ðæt ɹᵻtˈɜːnd tʊ ˈɜːθ; ɐ sˈɜːvɪs mˈɑːdʒuːl ˌɛsˈɛm, wˌɪtʃ səpˈoːɹɾᵻd ðə kəmˈænd mˈɑːdʒuːl wɪð pɹəpˈʌlʃən, ᵻlˈɛktɹɪkəl pˈaʊɚ, ˈɑːksɪdʒən, ænd wˈɔːɾɚ; ænd ɐ lˈuːnɚ mˈɑːdʒuːl ˌɛlˈɛm ðæt hæd tˈuː stˈeɪdʒᵻz—ɐ dᵻsˈɛnt stˈeɪdʒ fɔːɹ lˈændɪŋ ɔnðə mˈuːn ænd ɐn ɐsˈɛnt stˈeɪdʒ tə plˈeɪs ðɪ ˈæstɹənˌɔːts bˈæk ˌɪntʊ lˈuːnɚɹ ˈɔːɹbɪt.