sphaera recta

== English == === Etymology === First attested in 1932; Latin: sphaera (“sphere”, “globe of the heavens”) + rēcta (feminine nominative singular of rēctus, “right”, “upright”) = “upright sphere”. === Pronunciation === IPA(key): /ˈsfiːɹə ˈɹɛktə/ === Noun === sphaera recta (singulare tantum) (astronomy) An idealised conception of the celestial sphere in which the celestial equator is perpendicular to the local horizon and the Sun reaches the zenith at its highest point. For more quotations using this term, see Citations:sphaera recta. ==== Antonyms ==== sphaera obliqua == Latin == === Pronunciation === (Classical Latin) IPA(key): [ˈspʰae̯.ra ˈreːk.ta] (modern Italianate Ecclesiastical) IPA(key): [ˈsfɛː.ra ˈrɛk.ta] === Noun === sphaera rēcta f sg (genitive sphaerae rēctae); first declension (New Latin) sphaera recta ==== Declension ==== First-declension noun with a first-declension adjective, singular only.