The below considerations are too raw to be published as an article, so I decided to share them in informal manner.
I was re-reading my own recent article dedicated to the Voynich "stars", when suddenly it occurred to me that the total number of stars in f68r1 and f68r2 (including unlabeled) equals 88.
The interesting fact is that the number of standardized constellations is 88. This is, of course, no more than a curious coincidence, because the definitions and number of constellations evolved over time. However, this made me wonder whether the "stars" in f68r1 and f68r2 might not represent constellations.
A medieval astrological chart would naturally be represented in ecliptic coordinates, that is the "equatorial" plane would be that of the ecliptic. Note that Sun is depicted on the circumference - which would be the ecliptic. This is logical from the astronomical point of view, although I'm afraid this is not common from the perspective of the star maps of this kind.
In the supposed northern, or what I call "dayside" (f68r1), chart we have 29 labeled stars, in the southern (nightside, f68r2) we have 24 labeled and 35 unlabeled stars.
Suppose the labeled stars stand for known constellations. So we need 29 northern and 24 southern constellations.
Ptolemy introduced 48 constellations, of which 47 still survive, and Argo Navis was later split into three distinct constellations, but in 15th century it was Argo Navis still. These 48 constellations can be subdivided as follows:
21 northern (in respect to the ecliptic): Andromeda, Aquila, Auriga, Bootes, Cassiopeia, Cepheus, Corona Borealis, Cygnus, Delphynus, Draco, Equuleus, Hercules, Lyra, Pegasus, Perseus, Serpens, Triangulum, Ursa Major, Ursa Minor, Sagitta, Ophiuchus.
15 southern: Ara, Argo Navis, Canis Major, Canis Minor, Centaurus, Cetus, Corona Australis, Corvus, Crater, Eridanus, Hydra, Lepus, Lupus, Orion, Piscis Austinus.
12 ecliptical (zodiacal): Aquarius, Aries, Cancer, Capricornus, Gemini, Leo, Libra, Pisces, Sagittarius, Scorpius, Taurus, Virgo.
The problem is whether the zodiacal constellations (residing on the ecliptic) would be attributed to the northern or to the southern hemisphere. In contemporary star charts they are shown partly in northern, partly in southern (which is the actual state of things), but here we have each constellation (supposedly) represented by only one asterisk character, so that's the question. Are they there at all? If they are, then how are they distributed between the two? (They can't be all in northern or all in southern because that would be 21+12 = 33 for northern or 15+12 = 27 for southern which exceeds the actual amount of labeled "stars").
In any case, even with 48 constellations of Ptolemy we lack 29+24-48 = 7 constellations. I think that Ulug Begh's constellation system did not differ much from that of Ptolemy, so we need to search for missing pieces elsewhere.
Let us look at Europe.
Circa 1450 the constellation of Crux began to be considered as a standalone constellation.
Later additions seemed to be Coma Berenices and Antinous You are not allowed to view links.
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Login to view., which are both northern constellations (Antinous is now obsoleted), and then 12 more southern constellations published in You are not allowed to view links.
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Login to view. who, in turn, took information from the Dutch naval expedition of Keyser and Houtman. Those constellations are:
Apus, Chamaeleon, Dorado, Grus, Hydrus, Indus, Musca, Pavo, Phoenix, Triangulum Australe, Tucana, Volans.
Of course, this is far later than what the VMS is dated to. But considering the Ptolemy's nomenclature alone, the balance is more or less adequate. Supposing 8 of zodiacal constellations topping up the northern side to 29, with 12-8 = 4 left going to the southern side and yielding 15+4 = 19 for it, we then need only 24-19 = 5 more southern constellations to complete the picture. Where were they taken from? Perhaps from some other influence, such as Chinese. As far as I know, the Chinese constellation system includes much more than 48 constellations, so there is certainly no direct mapping. But some southern constellations known to the Chinese might have been "borrowed". Europeans were in China since 13th c., so that would be nothing surprising.
What for the unlabeled stars? While the 23 stars forming the outer circle of f68r2 may be considered as an "embellishment", at a minimum we are still left with 88-29-24-23 = 12 unlabeled stars. From the perspective of the author this looks like "I know that there
are constellations, but I don't know how they are called". Does this look as something real? I don't know.
What do you think?