galactic
adjective /ɡəˈlæktɪk/
/ɡəˈlæktɪk/
- relating to a galaxy
银河的;星系的 - A galactic year is the time the galaxy takes to rotate once completely.
一个银河年是星系完全旋转一次所需的时间。
词源mid 19th cent.: from Greek galaktias (variant of galaxias ‘galaxy’) + -ic. - A galactic year is the time the galaxy takes to rotate once completely.