- tenkyuu celestial sphere, the heavens
A formal or astronomical term encountered in science writing, documentaries, or poetic contexts; not common in daily conversation.
天球は地球を中心に回っているように見える。
Tenkyuu wa chikyuu o chūshin ni mawatte iru you ni mieru.
The celestial sphere appears to rotate around the Earth.
彼は天球の地図を広げて星を探した。
Kare wa tenkyuu no chizu o hirogete hoshi o sagashita.
He spread out a map of the celestial sphere and looked for stars.
⚖️ Often confused with 'tenmon' (astronomy), but 'tenkyuu' refers specifically to the imaginary sphere, not the science.
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