"Astronomy Domine" (alternative "Astronomy Dominé") is a song by the English rock band Pink Floyd. The song, written and composed by the original vocalist/guitarist Syd Barrett, is the opening track on their debut album, The Piper at the Gates of Dawn (1967). The lead vocal was sung by Barrett and the keyboard player Richard Wright. Its working title was "Astronomy Dominé (An Astral Chant)". "Domine" (the vocative of "Lord" in Latin) is a word frequently used in Gregorian chants.
