Here’s an interesting piece posted by the MIT Press about different cultures’ mystic conceptions of the Milky Way which includes the Egyptian mythology that Thelema references. While many Mechanists deride mythology I’d suggest that it provides an accurate, if impressionistic, view of a people’s perspective of their relationship with their greater environment. An excerpt reads:
The ancient Egyptians may have held a similar belief. Nut, the sky goddess who swallowed the Sun at dusk and gave birth to it once more at dawn, also served as a ladder for the spirits of the pharaohs to climb up to the sky. Her arched, often star-studded body adorns sarcophagi and tomb walls, and is thought to be a depiction of the Milky Way.
https://thereader.mitpress.mit.edu/the-myths-and-lore-of-the-milky-way/.