This scene represents a comet loosing moisture as the warmth of the star thaws them as it approaches, or passes by the Earth like planet.
For the 1600 sized image, zoom in and right click + Save As.
For full size you will have to download. It's 6000x5600
Behold, two habitable binary planets, one with a moon orbiting around it.
Another 4-8 hours with small level edits done after the speed paint.
I also used personal rocky textures for the mountains as finishing touches.
To use for Commercial use, I request for a small portion of the profits.