OK, My turn:
This is so much fun!
This is not the Arabic numeral one, but it is at the same time the Roman numeral one and the letter I.
Interestingly, I was thinking about the I O too, and the worm ouruborus biting its tail. Didn't make the phi connection though until sun-toon brought it up.
Probably would look better with the center of the I faded out a little so the Earth shows through.
(I think the origin, as used on the on/off switch, is digital computer code, 1 and 0.)