Hi TB - You will have to visit the New Age section for some of these or order on line - disregard the NA label and open your mind - here you can find much beautiful "Space Music."
Constance Demby's (Electronic Symphonic music
http://www.constancedemby.com/frames.html ) Her album Novus Magnificat - Through The Stargate from the late 1980s is a landmark of some of the best space music available even today. Another of her albums Aeterna is simply a stunning work of space soundscapes. I also listen to an Australian artist called Michael Wild -Stardreams & Beyond Worlds are among his finest
http://www.kinesiologyshop.com/eqop6.htm Of course Jarre, Schulze, Tangerine Dream, Vangelis have some great space music. Another older CD to look out for is Robert Schroeder's Time Waves album
http://musicmp3.ru/artist_robert-schroeder.html I have many, many thought provoking albums from these and many more "space" artists. I have a CD titled Return Of The Comet (about the time of Halley's Comet) that whenever I play it (and Novus Magnificat) people ask what is that lovely music, unfortunately it's no longer available that I am aware of. I also like listen to a Jack Johnston's CDs while in my observatory and can recommend the Cafe Del Mar range of CDs. And then of course there is great comedy (like Stephen Wright) but that's another discussion.
PeterM