I went to download 'Ancient Egyptian Sky Lore: Rethinking the Conventional Wisdom' but Academia apparently wants to share my contact list (?). So I read 'The Egyptian Origins of Planetary Hypsomata'. (Are any scholarly reviews of this paper available?)

I'm no expert but I found Joanne Conman's thesis convincing - that the AE defined their calendar from the timing of the heliacal rising of stars on the horizon (rather than in the heavens). What she says about planetary conjunctions and the essentially religious (or astrological) nature of the AE fascination with the sky seems rather likely. Of particular interest is the grand conjunction of 1953 BCE, and the rise of the cult of Amun referred to the star Canopus.

I'm interested to learn what she has to say about the situation in the Old Kingdom.