No text, but a visual code

[Antonio García Jiménez]

Thank you VViews, you are right. I wrote 'medieval times' and that is not correct. The circled dot symbol for the Sun appears in the XV century in Europe and that time isn't medieval but Renaissance, at least in Italy, and I think the Voynich is an Italian book with some features of the Renaissance.
  
It woud be an error to think that the circled dot is an iconic representation of the heliocentric theory with the Sun in the center, because we can see the symbol in books of the XV century, before Copernicus.
 
 I think the symbol is iconic but represents the Sun's epicycle with the dot in the center and the Sun spinning around of it. The symbol is then a part of the complex machinery of Ptolemaic system for explaining  the different positions of the Sun seen from the Earth.