Astralgender

Astralgender is a xenogender that feels connected to space, stars and the universe. Similar identities include stargender, galaxxin, genderspace, and many other astronomique genders.

History
The term was coined by an unknown at an unknown point of 2016.

Flag
The flag was designed by DeviantArt user chimericalhills on or before July 15th of 2016, and was posted on pride-color-schemes page. It has no confirmed meaning.

Resources
https://pride-color-schemes.tumblr.com/post/147459980286/astralgender