Wiktionary
exoplanetology
n. (context astronomy English) The search for, and study of, exoplanets
Wikipedia
Exoplanetology
Exoplanetology, or exoplanetary science, is an integrated field of astronomical science dedicated to the search and study of exoplanets (extrasolar planets). It employs an interdisciplinary approach which includes astrobiology, astrophysics, astronomy, astrochemistry, astrogeology, geochemistry, and planetary science.