What is Aeronomy?

AERONOMY is the scientific study of the physics and chemistry of the Earth’s upper atmosphere, as it interacts with solar radiation and cosmic rays. This field of study primarily focuses on the composition, behavior, and processes occurring in the Earth’s ionosphere and exosphere, including the distribution of temperature, density, and chemical constituents, and the chemical reactions that occur. Studies of Airglow is an example of the diverse subjects that properly come under the heading of Aeronomy.

Panoramic shot of the VLT platform
The VLT platform with the red shades of airglow visible overhead.
ESO/Y. Beletsky - [source]