astro-

Từ điển Oxford Advanced Learner 8th

astro- BrE [ˈæstrəʊ] NAmE [ˈæstroʊ] combining form
(in nouns, adjectives and adverbs)connected with the stars or outer space
•astronaut
•astrophysics

Word Origin:
[astro-] from Greek astron ‘star’.