Astrology is one of those things that I regard as having some overall reality to it, in principle - even as I doubt the validity of any specific statement from Astrology.
For example, in The Last Battle, CS Lewis has a centaur correctly refute the rumour that Aslan has come-again to Narnia to rule in glory; because the Heavens tell him unambiguously that the world is in a terrible state, full of evil portent, worse than for centuries. We are not left in doubt that this form of Astrological divination is valid.
The general idea is that centaurs live a very long time, and sincerely devote their time to discerning and understanding the Heavenly realities. My understanding is that (in the Narnian world) the Heavens do not lie, because the stars and planets are angelic intelligences, situated in the supra-lunar regions beyond reach of evil and bathed in divine reality. So the Heavens will tell at least some of the truth about 'what's going on', in a situation when earthly information is distorted, corrupted and incomplete.
The usual - medievally-derived - view of Astrology is that each Heavenly-body has a distinct character, and exerts an influence on earthly things by some kind of 'beaming down' of rays/ fields/ forces/ emanations (or physical influences of some kind); to affect the composition, growth and behaviour of earthly things and beings.
But it comes to me that the reality is that the Heavenly Beings which we perceive as planets, moon and stars; are indeed Beings, and that they actually participate in the work of ongoing creation here on earth; and that that (and Not by ray, fields, forces or emanations) is how they exert their influence on earthly affairs.
So, we may (in principle, I suppose) come to know something of their work; in the same way we might learn of any thing; which is by a kind of empathic identification, by minds thinking the same thoughts. The different nature between the Heavenly objects is literally a difference of the character of these personified, conscious Beings; and their influence is built-into things in and by creation, rather than 'shining upon' already-created stuff.
I imagine that the Narnian centaurs, or some potential human equivalent, might come to know something of this work of creation, something of the knowledge of these Beings, in a simple and clear form; by direct and wordless intuition in answer to a sincere and formulated question, held steadily in consciousness, by a focused mind.