De or het aerologie?

The correct Dutch article is:

de aerologie

Rule Words ending in -logie: always de. See the rule
Meaning (Dutch) (meteorologie) weerkunde van de hogere luchtlagen

How to use aerologie

the aerologiede aerologie
this aerologiedeze aerologie
that aerologiedie aerologie
our aerologieonze aerologie
your aerologiejouw aerologie
every aerologieelke aerologie
which aerologie?welke aerologie?
a big aerologie / the big aerologieeen grote aerologie, de grote aerologie

Meaning, plural, diminutive, pronunciation and translations: WikiWoordenboek (Dutch Wiktionary) (CC BY-SA 4.0). Example sentences: Tatoeba (CC BY 2.0 FR).