The ancient Greeks believed that Mercury as observed during the morning was a different planet than the one during the evening, because each twilight Mercury would appear farther from the Sun as it set than it had the night before.
ðɪ ˈeɪntʃənt ɡɹˈiːks bᵻlˈiːvd ðæt mˈɜːkjʊɹi æz əbzˈɜːvd dˈʊɹɹɪŋ ðə mˈɔːɹnɪŋ wʌzɐ dˈɪfɹənt plˈænɪt ðɐn ðə wˈʌn dˈʊɹɹɪŋ ðɪ ˈiːvnɪŋ, bɪkˈʌz ˈiːtʃ twˈaɪlaɪt mˈɜːkjʊɹi wʊd ɐpˈɪɹ fˈɑːɹðɚ fɹʌmðə sˈʌn æz ɪt sˈɛt ðɐn ɪt hæd ðə nˈaɪt bᵻfˈoːɹ.