Space physics: gravity forces, orbital flight, hyperdrive

the goal here is to do something similar to Universe Sandbox?

Will the effect of the distortion of light rays by galaxies appear in SE?

I should note: as long as SE is a scientifically accurate Universe simulator, then one day it will implement ALL space objects and phenomenon that are known to modern astronomy (if this would be possible to implement on the personal computers). So you may not bother yourself with questions like "will SE one day have meteor rain implemented". I guarantee that it WILL.

Animation or simulation of galaxy rotation

Motion of stars in the galaxy

Maybe in the far future of SE if a physics version is made, but for now things like this won't be added.

LIke about maybe 2 trillion years in the future when low mass red dwarfs start dying?

Unique procedural model for each galaxy
Models of irregular and colliding galaxies
Complex rendering of spiral galaxies (bulge as precomputed texture + disk as sprites)
A closed universe or a universe with a domain structure
Embedding of giant nebulae sprite models into the galaxy disc sprite model
Adaptive level of detail of galaxy sprite model
Render the galaxy by ray tracing
Correct blending of dust with the stars (ray tracing or multipass)
Animation or simulation of galaxy rotation
Simulation of collision of galaxies
Modeling the evolution of galaxies
Correct rendering of dust sprites (extinction effect)
Procedural large-scale distribution of galaxies (clusters, filaments, walls and voids)