Both solar system and exoplanet research study the same class of objects, yet these fields grew from the geosciences and astronomical sciences, respectively. Our solar system provides a detailed view of one planetary system in one epoch, while exoplanets provide sparser data from thousands of systems in various points in their lifetime. A holistic approach to unveiling the fundamental processes that drive planetary formation and evolution must therefore consider both complementary sources of information. My thesis presents three case studies in this context, and this talk will cover one in detail. I will specifically bring aeronomy, the geoscientific study of upper planetary atmospheres, to exoplanet science. By observing an exoplanet like a solar system planet — in multiple wavelengths and over multiple epochs — I will document a canonical solar system atmospheric escape process on an exoplanet for the first time.
