| 释义 |
天文学tiānwénxué研究天体的结构、形态、分布、运行和演化等的学科,一般分为天体测量学、天体力学、天体物理学和射电天文学等。天文学在实际生活中应用很广,如授时、编制历法、测定方位等。{astronomy; science of the universe in which stars, planets, etc. are studied, including their origins, evolution, composition, positions, motions, etc., covering celestial surveying, celestial mechanics, astrophysics, and radio astronomy, widely used in real life for such purposes as providing time service, compiling calendars and determining positions} |