Space music, not to be confused with new age, has long been a musical theme in my little edge of the world. Vangelis is probably one of the more recognized practitioners of the genre. Particularly inspiring was his L'Apocalypse des Animaux, and Heaven and Hell, much of which inspired Carl Sagan to create Cosmos.
There's a brief bridge - more of an interlude - in Close to the Edge (1972) by Yes that is among the earliest non-classical music "space music" bits that has that "being in space" texture. The 1967 Moody Blues Days of Future Passed kind of dabbles in a track or two, as does To Our Children's Children's Children (1969).
I've been casually investigating this musical theory for a while, but haven't found the moment where non-classical space music originates - it has to have a start. I know there is a seeming bifurcation after the post-war development of musique concrète that leads to the development of the synthesizer to reproduce or mimic sounds. Several people adopted that tool to reproduce classical pieces, but just who was the first to develop that sense of space travel in a non-classical manner (that's what church music was doing for a few hundred years) I haven't found.
In the very early 1980s Hearts of Space gathered a great many of these early creators and played them on their weekly program. (Space 40 was particularly good.)
Here's a nice early album by K. Leimer (1981):
https://youtu.be/weAXPHv8GSM?si=h1gUCRwscXqAONjr
One of the more intriguing compositions is by Stomu Yamash'ta: Sea and Sky (1984,) which combines synthetic and orchestra compositions.
https://youtu.be/Cn7Z54XMbEc?si=OukJYV_v0jQIQSqe
Hope you find comfort and healing.