I think that’s gotta be part of the point of this ruling. Ignoring who is being advertised, this billboard is no sexier than your average car/perfume/alcohol/underwear ad, so it shouldn’t be disproportionately limited.

Just speculation but it would be totally plausible for a helix shaped galaxy or star (possibly being pulled into a black hole) oriented from an odd angle, with either a gap or a cloud of some sort blocking one part of it and it just happens to look like a common glyph.

But I’m no starologist