Where does “天の赤道” come from?

天の赤道 (Japanese) comes from Japanese の, from Old Japanese の, from Middle Chinese 能 — talent, ability.

天の赤道 (Japanese): celestial equator

Definitions

  1. celestial equator

Ancestry of “天の赤道”, step by step

天の赤道 traces back through 3 separate lines of ancestry.

via Japanese の

StepLanguageWordMeaning
1Japaneseのgenitive case marker; nominative case marker in a...
2Old Japaneseのplain, field
3Middle Chinese能talent, ability

via Japanese 天

StepLanguageWordMeaning
1Japanese天the sky, the heavens; the area above a kitchen...
2Old Japanese天sky, heavens
3Proto-Japonic*amay—

via Japanese 赤道

StepLanguageWordMeaning
1Japanese赤道equator
2Chinese赤道celestial equator; equator
Every word from Middle Chinese 能 →Every word from Old Japanese の →Every word from Japanese の →
天の赤道 — Etymology, Origin & Word History | Etymology Explorer