astromancy lore questions

[Dikatis]

So, about Astromancy and how they utilize the Aetherial Currents

It's not from the celestial currents but from the actual stars in the sky. To quote Jannequinard:

Astrology, or the reading of the stars, is a branch of aetherological science which originated in distant Sharlayan. There have been astrologians in Ishgard for thousands of years, but it wasn't until three centuries ago when Adaunel the Younger learned that the movement of the stars could also be used to foresee the movements of the Dravanian Horde that the field became popular.

Since then, what was once a single science has bifurcated into two similar yet ultimately different schools of learning: the Sharlayan school of astrology and the Ishgardian school─the former placing a focus on tapping celestial aether and transforming it into beneficial magicks, or astromancy, the latter specializing solely in determining the actions of our dragon enemies to the north.

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But the stars, they can serve us in other ways than merely revealing when the Horde will attack. Their powers can be tapped! The aether within can be used for─

The heavens they're referring to are different sections of space where astrologers have divined meaning and aether through their faith in the Twelve. Hence the Bole (Heaven of Earth, referring to Nophica and Althyk), Spear (Heaven of Ice, referring to Halone), Balance (Heaven of Fire, referring to Nald'thal), Ewer (Heaven of Water, referring to Thaliak), and the Arrow (Heaven of Wind, referring to Oschon). We also know it's specifically the stars and not the celestial currents running through the atmosphere because of the Level 80 AST quest:

As Kyokuho explained, unlike astrologians who look to the stars above to read their fates, geomancers look to the star below and listen to its songs, and draw their answers from its whispers.

Yet try as I might, I remain impotent in tapping the land's puissance. I've spent my life attuning to the slight variations in the aether of distant stars. So much so that when I look to Hydaelyn and her aether, I am overwhelmed by its potency...its glow, you could say. Think of it as trying to open one of the heavens' gates in a world of everlasting daylight.

You have visited such a place? Then my readings were accurate. Exactly where have your adventures taken you, Forename?

And you had no trouble channeling the aether from that world's heavens despite the fact that you never once physically laid eyes upon them?