So, I was teaching a friend how to use layers in Krita today. It started as a bubble. Then I added rings to make it look kinda like a proton, and erased the portion that was behind the bubble, because layers make that easy. I realized it was kinda looking like a planet once I was done, so I kinda, just... rolled with it.

I know, a SFW ARTWORK from me? Weird. Sometimes I just wanna art.

I suppose, if you want any lore to this art, it would be this:
In the distant future, planets at risk of extinction are contained within Planet Encasing Air Domes, keeping outsiders from entering, and those within trapped. It's make or break. Will they take the efforts to improve their air quality or fail and suffer the consequences?