Wonderful things, flags. You can sort all your planets you have scanned and make them different categories depending on their characteristics. Unfortunately, there is no way to sort them later, if you want to find all your owned planets with blue flags say.

A very simple way that we could do this is by adding the names of the colors of the flags to the planet search box; so if I typed in "blue" I would get all planets with blue flags (plus any that happened to have "blue" in their name, size, or richness o.O). Same with purple, green, gold, and red.

idk, i personally think we already have a pretty good organization system for planets although its not a bad idea +0.5