All Uranian moons can be featured except Umbriel in my opinion Exploration of Jupiter is a good idea too Jupiter Trojans Little is known about them However any article can become featured There were long discussions on Wikipedia talk Featured article candidate about notability and minimal length but they came to nowhere So if you start working on one of those articles Exploration of Jupiter or Jupiter Trojans I will support you As to Moons of Saturn I think the knowledge about them is very unstable now New information comes almost every day It is difficult to write about them Another my idea is to create Portal Jupiter