Pernefeldt used the principles of vexillology, the scientific study of flags, to create a meaningful design representing the water and life on our planet. The shade of blue was chosen to stand out against the black of space and the white of a spacesuit, and the interconnected rings form a flower to represent life on Earth and how it is intertwined.
The design follows the five basic principles of good flag design that were recently laid out in a TED talk by radio producer Roman Mars, with the arguable exception of the ring design being too complex.
Pernefeldt’s design process for the flag is discussed in a video that was included as part of Pernefeldt’s graduation project.
images via The International Flag of Planet Earth