Andrew Fraknoi, professor of astronomy at Foothill College, near San Francisco, has collected astronomy inspired music for many years and has organized them into a resource guide : Music Inspired by Astronomy: A Resource Guide Organized by Topic | Browse – Astronomy Education Review
He talks about this activity on his blog: Exploring the Universe: Music Inspired by Astronomy – Andrew Fraknoi
For more about space inspired music, as well as about music played in space, see the extensive HobbySpace Space Music resources.