Looks great. Lovely burning light effect and atmosphere gradient!
I'd up the luminosity of the stars and paint a mask on the background object to remove the stars from the bright corona of light and make them only visible in the darkest part of the sky.
Other than that, I don't think it even needs an interesting terrain to be effective, when I look at it I feel too high up to think I should be able to make out terrain details, a hint is nice but maybe a different type of hint, I'm not keen on the leaning mounds you have going on.
Nice job.