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Armillary sphere
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===Indian Subcontinent === [[File:Armillary sphere.JPG|thumb|Armillary sphere at the [[Garh Palace, Kota]]]] The armillary sphere was used for observation in India since early times, and finds mention in the works of [[Aryabhata|Āryabhata]] (476 CE).<ref name=Sarma08>Sarma (2008), ''Armillary Spheres in India''</ref> The ''Goladīpikā''—a detailed treatise dealing with globes and the armillary sphere was composed between 1380 and 1460 CE by [[Parameśvara]].<ref name=Sarma08/> On the subject of the usage of the armillary sphere in India, Ōhashi (2008) writes: "The Indian armillary sphere (''gola-yantra'') was based on equatorial coordinates, unlike the Greek armillary sphere, which was based on ecliptical coordinates, although the Indian armillary sphere also had an ecliptical hoop. Probably, the celestial coordinates of the junction stars of the lunar mansions were determined by the armillary sphere since the seventh century or so."<ref name=Ohashiast-inst>Ōhashi (2008), ''Astronomical Instruments in India''</ref>
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