宇う宙ちゅう科か学がく

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Meanings

1

noun

space science

Academic field covering astronomy, astrophysics, planetary science, and related disciplines.

eaves, roof, house

宙mid-air, air, space

科department, course, section

学study, learning, science

天てん文もん学がく
天文学 is specifically astronomy, while 宇宙科学 is broader, including astrophysics and planetary science.
宇う宙ちゅう工こう学がく
宇宙工学 is space engineering (applied), while 宇宙科学 is space science (theoretical and observational).

Compound of 宇宙 (space, universe) and 科学 (science).