Music you say? Music can be essential to setting the mood and pace of almost anything, Space Engine being no exception. Since music is one of my passions, I simply [i]must[/i] share my selections with the forum - else I may implode.
So called space ambient music as a venue of choice is practically a no-brainer. The actual definition of it is rather vague though, and can range from anything, from electronic to drone. Personally, I find anything with more beats then say, trance or psychill to be overbearing. Definitely nothing like orchestral rock or pop (no offense). It is just a matter of environment - space is vast and more or less infinite. Things move in it with unstoppable serenity through black voids of floating particles - all in a state absolute cold silence so deafening it ruptures the ears. Sound vibrations from stars etc. exist, but there are so few things that they can interact with to make much of a ring.
The music should reflect that - as you fly through nebulae, boo around orbiting ships, dive through exotic atmospheres and touch down upon alien landscapes or just gaze at the stars around you.
To start with, Simon Heath's Sabled Sun albums from Cryochamber are a great, high-quality start:https://www.youtube.com/results?search_query=sabled+sun
Perhaps the greatest for flying through space as you sit in a darkened room: https://www.youtube.com/watch?v=MYqsKJAmsOE
Telomere's album "Lux Primordia" is also stimulating:https://www.youtube.com/watch?v=RvQ_6lF ... gLt9OnwTjC
Any "Sonus Lab" track was practically MADE for SE, and also incidentally aids in sleeping: https://sonuslab.bandcamp.com/
Also of Cryo Chamber fame(https://cryochamber.bandcamp.com/
), "Alphaxone" has some awesome space ambient, like Edge of Solitude: https://alphaxone.bandcamp.com/album/edge-of-solitude
Stardust (with ProtoU): https://alphaxone.bandcamp.com/album/stardust
and Echoes from Outer Silence: https://alphaxone.bandcamp.com/album/ec ... er-silence
NASA's Symphonies of the Planets are the actual sounds of our solar systems planets (well not really, they are magnetic readings of the Voyager probes and other crafts put through a synthesizer and then tweaked for greater audial enjoyment) but are still REALLY cool. Look around for the individual tracks for each planet, but here is the complete album(s):https://www.youtube.com/watch?v=Vjz9m1TkQ_A
"Sphare Sechs", also of Cryochamber, is space ambient at its finest (some might find it boring):https://cryochamber.bandcamp.com/album/particle-void
An artist called "CO.AG Music" releases interesting music with themes from various media sources, often outer-space scifi-ish, and are copy-right free, so I could see SE maybe featuring this music in the future: https://www.youtube.com/channel/UCcavSf ... WwLDm_bNvA
A personal favorite for exploring SE with:https://www.youtube.com/watch?v=u9a1EQS_9Wo
Trivia: the humming tone used by the artist for the music shows up in the original Bladerunner film in Rick Deckard's apartment, as well as aboard the "Nostromo" in the original Alien movie (though fainter).
"Askprojekt" is good: https://www.youtube.com/results?search_ ... ce+ambient
An artist which many may or may not be aware of is "Julien H Mulder", who makes high-quality dark ambient space music I find chilling: https://www.youtube.com/user/julienhmulder
From the 90's, comes another good space-ambient artist, "S.E.T.I" (Most definitely to be confused with the project of the same name
): http://ambientmusicguide.com/a-z-essent ... r-deupree/
The up and coming artist Markus Junnikkala on YouTube has an album called "Andromeda" that is pretty similar to the music in SE already: https://www.youtube.com/watch?v=CURyn1J ... fheAN-8e8X
Anything made by "Stellardrone" is of course pure sonic gold, as been mentioned before by previous posts:https://stellardrone.bandcamp.com/
There is an actual YouTube channel (which now appears to be non-maintained sadly - I am not entirely sure), called "SpaceAmbient" (https://www.youtube.com/user/SpaceAmbient
), of which Stellardrone is featured, that has TONS of good music from various artists - too many to list here - go check 'em out.
When it comes to pre-mixed albums of space music, YouTube channels like "JediMaster" (https://www.youtube.com/user/RaverJedi
)or "AmbientEpicuros" (https://www.youtube.com/user/TheAmbientepicuros
) are very good, the latter being more of psychill, a simple search will turn up tons of these - most of which are very long.
Some of Musica Cthulhiana's tracks are outer-spacey, like "Atmospheres", of the album "The Unnameable", and various tracks from the album "The 4th" ( https://cthulhumusic.com/
). Dark horror Ambient can be viable space music - remember, no one can here you scream in space - unless you bump helmets.
Hmmmm, listening to Vangelis can be interesting too.
These are just my suggestions, and although I would like to hear some of these in Space Engine, it is my hope that before then, others may enjoy them with the game via modding or just with an mp3.