No text, but a visual code

[ololololo]

it is classified as cosmological

I believe this is stated You are not allowed to view links. Register or Login to view.. It’s called that because it’s referred to as the cosmological section. This doesn’t mean that René, deep down, supports your theory.

a certain resemblance between some of the rosettes and cosmological diagrams from the Voynich

By the way, yes. For some reason, I haven’t heard this particular thing from you.
Well, actually, in addition to the general similarity, we can find similarities between some Rosettes and Astronomy. More details You are not allowed to view links. Register or Login to view..
But this, in fact, has nothing to do with your theory and doesn’t prove it in any way. We don’t know what causes this similarity, or how significant this “similarity” actually is.

f70r1

Wolkenband is also present in other bands. I tried to match this diagram with the rosettes myself, but I couldn’t do it.

Although he doesn't say which ones

From voynich.nu:
Brumbaugh considered that the small circle in the lower left corner represents a clock, but this is not followed by anyone as far as I am aware. Some connection with f67v2 seems not unlikely.