This is based on the meteor background from CI2.
What about a background that adds comets flying under you?
they will be flying under you, will be kinda transparent because they are Far from you, these won’t kill you, but will make the mission more epic. (Warning: Could distract you)
i made a example about how the background would look like:
as you can see, they will be small from your point of view of your spacecraft and they will move at medium speed.