-First of all a flag must comply with the basic principles of vexology (About wich Roman Mars has something to say https://www.youtube.com/watch?v=pnv5iKB2hl4)
-Secondly our flag must evince our values and aspirations (science paramount among them) hence the golden ratio and other geometric relations
-Asgardian logo was taken for granted
-Its international character and no specific reference to any nation is shared putting the Asgardian logo among Earth and Moon
-And finally the colour is borrowed from Oskar Pernefeldt's Earth Flag (his reasoning for it is flawless)