I have an idea about something Laura wrote in the book, so fair warning a spoiler quote is to follow. On page 348-
Late in his career (possibly about 135 BCE), Hipparchus compiled his star catalog. He also constructed a celestial globe depicting the constellations, based on his observations. This celestial globe may have been the model for the Atlas Farnese Globe. The peculiar thing about this globe is the fact that all the constellations are shown in reverse, as they would be seen by someone outside of the cosmic system, i.e. the ‘hypercosmic’ perspective. Or, perhaps, it was intended to be viewed in a mirror for some reason.
Knight-Jadczyk, Laura (2013-01-15). Comets and the Horns of Moses (The Secret History of the World) (p. 349). Red Pill Press. Kindle Edition.
The part in bold is what struck me when I read it. I do not know how this device was constructed(if it was a "device" at all), but if it was hollow with the stars/constellations being holes while the rest was solid, it could be possible to illuminate it from within to project the reverse image on a surface. If this is the case and function of the device, it would mean that Hipparchus created the first planetarium projector. All he would have had to do is place a candle in the middle of the device inside a dark room and voila!
Just a thought, but I could be way off since I do not know how it was constructed. It makes me wonder if he had somehow read or had access to the now lost writing of Archimedes titled "On Sphere-making". No clear evidence of the 2 spheres Archimedes supposedly created exists except in writings of others during that time, but if they existed and somehow Hipparchus saw them, it may have some relevance to his constellation sphere.