Flags of the Solar Federation

Just daydreaming some banners for fictional political entities in my nebulous future history setting for my sci-fi spaceship games.  These are the flags for some of the Off World Colonies prior to the advent of interstellar travel.

FREE MARS

As the revolutionaries used red bandanas to signify rebel affiliation, the Mars Conclave adopted the plain red banner as its flag upon receiving UN recognition.

LUNAR REPUBLIC

The gray field represents the lunar surface, while the black field above represents the airless sky of the moon (this may not be apparent in your browser because the black blends into the background color of this post).

SATURN CONFEDERATION

The vertical bands represent the surface of the planet and three of its major rings.  The gap between the gray and white bands is the Cassini Division.

This is all I have so far; I may do more if the inspiration strikes me.  Anyone else make up flags for their fictional nations?