Hard job to stitch one together. I suppose Vova has a basic bump texture that handles the topography... ahh no, he doesn't, he uses fractal generation, so it's generated on the fly during the universe generation.
I think so, and I know Vova is familiar with the similar Russian program Spaceway which uses this feature. As you approach a celestial body, a map of the surface pops up on one of the info screens (if you have it set to Surface mode) along with a crosshair showing exactly where you are over the surface. It's similar to Noctis.