The Academic Zodiac stands for NASA-based astrology. Minute accuracy from Pasadena. The 13 info was probably for kindergarten? The professor probably works with children. The 16 zodiacal stations of the Sun do not define the zodiac, it would be too simplistic as well as terribly inaccurate.
The 16 ascendants have nothing to do with the (13) 15-16 Sun-signs, since the Sun does not rise at east. The ascendant set is in constant precession. Most of us will observe Venus rising in Pegasus, much as we had Venus in Hydra a while ago: these are some of the accurate positions of the planets to observe in a scientist.”