armillary sphere

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  • noun

Synonyms for armillary sphere

a celestial globe consisting of metal hoops

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References in periodicals archive ?
In the case of the armillary sphere, used for measuring the longitude of any star, he notes that we must first have the coordinate of a reference star.
820), an armillary sphere with divisions for each ten arc minutes and a circle "whose nature is unclear43 had been used (see below), while in the second observational program, a mural quadrant (lubna) and a gnomon (shakhis) were used.
While the nature of the instrument is as yet unclear, it appears to have been an instrument having the same applications as the armillary sphere.
Inspired by ancient astronomy armillary spheres, the Equinox collection has three interlocking rings that pivot.
Tosi selected the images of his study according to the objects that accompany the sitters: astrolabes, regular bodies, solar clocks, armillary spheres, globes, astronomical instruments, and mathematical texts.
Armillary spheres of the late Middle Ages and the early eighteenth-century proto-orreries of George Graham (essay VII) served similar purposes in different social contexts.
armillary spheres to evoke thoughts of adventure, exploration,