Wow, that's very nice! Thank you for sharing. If I had to give any suggestions, I'd say that the planet surface seems a bit, well, distant, perhaps with some atmospheric haze or something. The terrain doesn't "pop" for me. Maybe upping the brightness/sharpness/contrast would make it more... tangible? If that helps. But that doesn't make the piece less enjoyable, I can see you've put a lot of time into it.