implement HDR graphics(basically render to float-point texture, then mapping of [0; +inf]^3 color values to the usual [0, 1]^3 range in the second pass, + bloom effect based on the illumination power at particular point)
make models and shaders for suns/planets/(moons) => rendered in background to cube map, large-scale coordinate system needed.
Till approximately 2-3 of March;