Astronomy is a 1974 song by Blue Öyster Cult. The song’s lyrics are selected verses of Sandy Pearlman’s poem “The Soft Doctrines of Immaginos”, mainly covering aliens known as Les Invisibles guide an altered human named Imaginos, also called Desdinova, through history, playing key roles that eventually lead to the outbreak of World War I.
The song was covered by Metallica in their 1998 cover compilation album Garage Inc., and the band twisted the original song’s theme to their own tone and rhythm, while maintaining the essence of the song, making it one of their best cover songs.
And here’s the original: