astronomy
n. uncountablen. the scientific study of stars, planets, and other objects in space. It looks at how these things move and what they are made of.
n. the branch of science that deals with celestial objects, space, and the physical universe as a whole. Modern usage refers specifically to the scientific discipline rather than the historical or astrological context.
She decided to study astronomy to learn about the solar system.
Advances in telescope technology have allowed the field of astronomy to observe galaxies billions of light-years away.
While ancient civilizations used astronomy primarily for navigation and timekeeping, modern researchers utilize it to probe the fundamental laws of physics through the observation of distant black holes.
From Middle English astronomie, astronemy, from Old French astronomie, equivalent to astro- + -nomy. Displaced native Old English tungolcræft.
Uncountable; typically used without an article when referring to the field of study.
He is interested in the astrology.He is interested in astronomy.Learners often confuse 'astronomy' (the science) with 'astrology' (the belief that stars influence human events).