equinoctial$25683$ - определение. Что такое equinoctial$25683$
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Что (кто) такое equinoctial$25683$ - определение

PRINCIPAL MERIDIANS OF THE CELESTIAL SPHERE
Equinoctial colure; Solstitial colure
  • '''Orange''' = equinoctial colure<br> '''Blue''' = solstitial colure
  • '''G''' = equinoctial colure<br> '''H''' = solstitial colure

Colure         
·noun One of two great circles intersecting at right angles in the poles of the equator. One of them passes through the equinoctial points, and hence is denominated the equinoctial colure; the other intersects the equator at the distance of 90° from the former, and is called the solstitial colure.
Astronomical rings         
  • Diagram of astronomical rings ''(Johannes Dryander, Annulorum trium diversi generis..., published Marburg, 1537)''
  • Astronomical ring with an [[alidade]] on the declination ring (folded closed).
  • Equinoctal sun dial
  • Modern sundial compass
EARLY ASTRONOMICAL INSTRUMENT
Annuli astronomici; Gemma's rings; Farmer's ring; Astronomer's ring
Astronomical rings (Latin: annuli astronomici), also known as Gemma's rings, are an early astronomical instrument. The instrument consists of three rings, representing the celestial equator, declination, and the meridian.
colure         
[k?'lj??]
¦ noun Astronomy either of two great circles intersecting at right angles at the celestial poles and passing through the ecliptic at either the equinoxes or the solstices.
Origin
ME: from late L. coluri (plural), from Gk kolourai (grammai) 'truncated (lines)', so named because the lower part is permanently cut off from view.

Википедия

Colure

Colure, in astronomy, is either of the two principal meridians of the celestial sphere.