Origin: Greek suffix -nomy
Astronomy has 2 different meanings across 1 category:
The study of the physical universe beyond the Earth's atmosphere, including the process of mapping locations and properties of the matter and radiation in the universe.
"After years of studying astronomy at university, she finally became fascinated by the intricate details of how astronomers map distant galaxies."
In plain English: Astronomy is the study of everything in space, including stars, planets, and galaxies.
"My son loves astronomy and spends his nights looking at stars through his telescope."
Usage: Astronomy is the scientific study of celestial objects like stars, planets, and galaxies, focusing on their composition and motion outside Earth's atmosphere. Do not confuse it with astrology, which involves predicting human events based on star positions rather than observing physical phenomena.
The word astronomy comes from the Old French term astronomie, which combines elements meaning "star" and "management." It replaced the earlier native English word for this field of study.