neo-identity:

A gender that is related to a planet, celestial body, or astronomical object in our solar system. Umbrella term for linnutgender, sonnegender, lunirgender, mercugender, venugender, terragender, marigender, juperigender, saturnigender, uranugender, neptunigender, and plutigender.

This flag is a depiction of the solar system using the planets from each individual flag.

Fascinating!

-ap