Celestial Horus kas or souls
The king not only united Upper and Lower Egypt but he was also the link between the human and divine worlds. Although the king himself was a human being, the office of kingship was divine; the human body of the king was a vessel in which divine kingship manifested itself in the form of the royal ka or life force that was passed on from one king to the next. The king was similar to, though not identical with, the gods, and his titles, netjer nefer, meant ‘Perfect God.’
(Robins, G. (1997). The art of ancient Egypt. Cambridge, MA: Harvard University Press. p 18)
Taking my stance that the ka or soul of the king was a celestial body, let us say Mars, then the above offers clear support for the notion that the body of Mars was named and renamed many times over as Egypt’s god kings. As the kings reigned over earth (literally) they were the manifestation of the sky god Horus. The largest body with respect to earth was naturally deemed the “Living Horus.” This could either be Mars, Mercury or the Moon (occasionally Venus in the guise of Hatshepsut). Errant planets that danced with earth and are at the very foundation of Egypt’s divine royal family (and other ancient cultures). I have dubbed these planets “Horus bodies” since anyone of them could sit on the throne of Horus, and in doing so take on one of the many forms of Horus (i.e., winged disk, Haroeris, Harsiese, etc.).
The above has been added to The Crux of the GKS – Egyptian Dualism.