One of a handful of albums Sun Ra released on the legendary Impulse! Label in the early '70s, Astro Black provides a comprehensive picture of where the Arkestra was around the time, drawing to the end of their ultra-free period and beginning to investigate more traditional jazz forms, and even the fringes of funk. Pressed on purple vinyl! 1. Astro Black 2. Discipline "99" 3. Hidden Spheres 4. The Cosmo-Fire