asteroseismology

noun

Etymology: From aster- (“star”) + -o- + seismology (“study of Earth's vibrations (ie. earthquakes)”). Ultimately from Ancient Greek ἀστήρ (astḗr, “celestial body”) + σεισμός (seismós, “earthquake”) + -λογία (-logía, “study of”)

1. The study of oscillations in stars.