Possible Clues:

• Late jazz musician who insisted he was from Saturn
• Jazz composer with an Egyptian-inspired name
• Avant-garde jazzman who named himself after an Egyptian god
• The Arkestra jazz band leader
• Jazz legend whose band was called 'the Arkestra'
• 'Jazz in Silhouette' composer
• 'Space Is the Place' jazzman
• Jazz pianist with 'Space is the Place'
• Jazz musician from either Saturn or Alabama, depending on whom you believe
• Space-music jazzman