The image linked from this thumbnail is free for personal use.

I'm very pleased with this. It incorporates maps created with the LunarCell, SolarCell, and Glitterati photoshop plugins (the latter in a "starbrite" mode to save the alpha channel of stars, kindly custom coded by the plugin author at my request!–and I think he hasn't yet released a public version with that mode), and other adapted work I've done with a ringed planet, and a 3D render of the planet derived from said textures/maps.

The cyan "shadows" on the rings were an accident–I lit the planet with red (the nebula) from one side and white from the other, and through the translucent green rings, it seems that white light canceled out red and left the rest cyan. No, that may not happen with real physics (or "real life"), so it may not be realistic. This is, um, stylized? And it's, um, a story involving antrhopomorphic extraterrestrial frogs? Yep. K thx. And yes, men, you're going to have a pink and purple book. Get over it.

I'd like to make the borealis more obvious/prominent/realistic, and strictly the planet doesn't have the moons mentioned in the story. Maybe I'll get around to updating it thus.