I use it on many monitors and really do not see the "flicker".
What resolution do you use? I would try to reproduce it. If you change from high dynamic range to to the standard range rendering, is it getign better?
Do you have nvidia or amd?
As I said, my star backgrond is not flickering at all (anymore!), and that is with geforce gtx 770 and a 1060 on every resolution and three different monitors.
But with my small ship hulls, I can not see the ships either, only when I activate the icons.
But that is something I really like and wanted.
To see them, I have to go close.
Here is a picture with two screenshots. both the same view.

- small.jpg (87.25 KiB) Viewed 452 times
I do not understand why we can not change the amount of background stars or at least turn them off.
Also the option to turn the nebulas off completely.
...
Besides that I like a huge universe that has much space - unfortunately not everybody can play with the best size and the smallest amount of stars. And the cpu is not that bad, because it depends on the number of the cores and the ram.
The best for me is 1000 stars at a galaxy that has 10x10 sectors. Thats 1000/100 = 10 stars per sector. All other options are packed denser. What comes closest is the smallest sector with 300 stars: 300 stars / 16 sectors = 18,75 stars per sector.
I write this into this thread because these are things that should be configurable. I do not see any reason not to allow it. We can not even mod this.
And of course the city lights that really annoy.
If those things could be solved, ok, there is the music and the hard to understand mechanic behind that.., besides the music and the too jumpy music change and the repetitive melody, so.. besides that, the game would have those easy to solve flaws taken care of and made much people happy.