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sphaera recta

Definitions

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun 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.

Etymologies

from Wiktionary, Creative Commons Attribution/Share-Alike License

First attested in 1932; Latin: sphaera ("sphere”, “globe of the heavens") + rēcta (feminine nominative singular of rēctus, “right”, “upright”) = “upright sphere”.

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