I never heard of Sun Ra before discovering him through clicking on the Knights of Pythias one day. He belonged to one of their youth groups when a boy in Birmingham, AL. Anyway, he was one of the jazz greats who made music professionally for decades and was a kind of guru to better known musicians like Coltrane, Miles Davis, and others. Sun Ra was a man of great talent and learning who studied theosophy, Ouspensky, and above all Egyptian esoterica. He was clean and sober while many around him were being devastated by drugs, alcohol, and sex. His music takes some getting used to and sounds much different if you listen to it while meditating. He makes sure you won't treat it as merely mood or background music. There's also a bio called "Space is the Place" and a movie by that name. Enjoy and learn from a time when music was the dominant philosophical medium in an America that today is brain-dead by comparison.