单词 | armillary sphere |
释义 | armillary spheren. Astronomy. A skeleton celestial sphere consisting of a spherical framework of intersecting circular rings centred on a sphere representing the earth or the sun, the framework revolving on a fixed axis within graduated horizon and meridian rings.The various rings represent astronomically important features such as the ecliptic, the Arctic and Antarctic circles, and the tropics of Cancer and Capricorn. Some rings may be movable so as to represent the appearance of the sky at different times and latitudes. The whole framework is typically on an angled and pivoted support.The original purpose was to demonstrate the motion of the stars in the sky, and (before the invention of the telescope in the 17th cent.) to measure the positions of celestial objects. It is now chiefly a teaching aid. ΘΚΠ the world > the universe > cosmology > science of observation > astronomical instruments > [noun] > angle-measuring armil sphere1556 armillar1603 armillary1625 armillary sphere1625 1625 W. Lisle tr. G. de S. Du Bartas Noe in tr. Part of Du Bartas 163 This and the rest would better be vnderstood with an Armillary Sphere in hand. [No corresponding sentence in the French original]. 1664 H. Power Exper. Philos. iii. 169 All the Circles of the Armillary Sphære. 1730 W. Webster tr. P. Hoste Compend. Course Pract. Math. III. 14 The sphere in plano is nothing else but the shadow of the several circles of an armillary sphere upon the plain of the meridian. 1817 W. Kirby & W. Spence Introd. Entomol. II. xxiii. 370 Never had any armillary sphere so many zones. 1886 S. P. Scott Through Spain ii. 88 His charts were constructed in the anterooms of palaces, his observations were taken from the domes of minarets provided with astrolabes and armillary spheres. 1965 R. P. Dore Educ. in Tokugawa Japan ii. 50 To find out what they could about..the Shogun Yoshimune with his clocks and his armillary spheres. 2008 N.Y. Times (National ed.) 4 May (Front section) 31/3 The statue's surface is flat and dull. Details like the zodiac signs in the armillary sphere are flaking. This entry has been updated (OED Third Edition, March 2016; most recently modified version published online December 2021). < n.1625 |
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