Chemical analysis showed that the abundances of ethane and methane were roughly equal, which is thought to imply that its ices formed in interstellar space, away from the Sun, which would have evaporated these volatile molecules.
kˈɛmɪkəl ɐnˈæləsˌɪs ʃˈoʊd ðætðɪ ɐbˈʌndənsᵻz ʌv ˈɛθeɪn ænd mˈɛθeɪn wɜː ɹˈʌfli ˈiːkwəl, wˌɪtʃ ɪz θˈɔːt tʊ ɪmplˈaɪ ðæt ɪts ˈaɪsᵻz fˈɔːɹmd ɪn ˌɪntɚstˈɛlɚ spˈeɪs, ɐwˈeɪ fɹʌmðə sˈʌn, wˌɪtʃ wʊdhɐv ɪvˈæpɚɹˌeɪɾᵻd ðiːz vˈɑːlɐɾəl mˈɑːlɪkjˌuːlz.