Aeronomy is the science of the upper region of the atmosphere. The term aeronomy was introduced by Sydney Chapman in a Letter to the Editor of Nature entitled Some Thoughts on Nomenclature in 1946. Studies within the subject mostly investigate the causes of  dissociation or ionization processes.

Aeronomy is the science of the upper region of the atmosphere. The term aeronomy was introduced by Sydney Chapman in a Letter to the Editor of Nature entitled Some Thoughts on Nomenclature in 1946. Studies within the subject mostly investigate the causes of  dissociation or ionization processes.