I am in the process of making an album (maybe 10 songs in total) based around this game. So far I have 3 songs. https://soundcloud.com/octavermusic
The soundtrack of the game is great and I am having a fun time making tracks to capture the feeling of wonder and awe of the game.
Also if the samples I used in 'Venus' and 'Space Walk' would be a problem I have versions without them I can provide.
These are great tracks to listen to while exploring in Space Engine! "Space Walk" reminds me of C418's Minecraft tracks (not necessarily negative), "Foreign World" is too fast and the beat stands out too much and reminds me of some of Kelly Bailey's Half Life tracks (what I like). Some tracks could use lighter beats. "In Orbit" and "Rings" are the most suitable for Space Engine in my opinion.
besides that I started making music, this is my first track (inspired by Space Engine): https://soundcloud.com/ole-a-sprtr888/disc-compass