Feeback: That looks sweet, and your use of real data to construct your universe is pretty hardcore.
It's been hard to develop (we had to parse astronomical data sheets from observatories and learn how coordinates, magnitude, color indexes working). Unity3D provided additional fun, but we managed. Saddly, even 5k of stars works too slow to be playable (we didn't optimize it yet, though) - but 1k works fine. It was interesting to find where our sun is.
10k of stars gave 3fps and wonderful picture.