As high as this looks to be set in the mountains like Everest 30 below zero does not seem that impossible to believe; now if the whole planet is like that however cold like a Class L planet than yeah that is something, like Mars is. The terra is believable as always as it does look like an actual place an the sun is at either high morning or evening, based on the haze I guess morning. The difference here being is the planets and or moons seen in the vastness of space, just the one detail to make this place so otherworldly, well done.
This looks fantastic! I took a browse through your other work and I absolutely love your lighting. No idea why I took a love to terra/space lately, but all of your work is really good. Great job, look forward to seeing more!