Journey to the Centre of the Galaxy - released in 1996. This CD started as a planetarium soundtrack.
Ganymede - this is the original version written for a planetarium soundtrack in 2000.
Lux Arumque - performed by the Cathedral Choir of Wellington Cathedral of St. Paul at the Derknedd to Light service, Advent Sunday 2014. Music by Eric Whiteacre.
The complete service is here.