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A volvelle from a sixteenth-century edition of Sacrobosco's De Sphaera. De sphaera mundi (Latin title meaning On the Sphere of the World, sometimes rendered The Sphere of the Cosmos; the Latin title is also given as Tractatus de sphaera, Textus de sphaera, or simply De sphaera) is a medieval introduction to the basic elements of astronomy written by Johannes de Sacrobosco (John of Holywood) c ...
Jost Bürgi and Antonius Eisenhoit: Armillary sphere with astronomical clock, made in 1585 in Kassel, now at Nordiska Museet in Stockholm. An armillary sphere (variations are known as spherical astrolabe, armilla, or armil) is a model of objects in the sky (on the celestial sphere), consisting of a spherical framework of rings, centered on Earth or the Sun, that represent lines of celestial ...
The clock has an armillary sphere with a diameter of 40 cm. The sphere is activated by a clockwork mechanism, designed to display the position of the heavens at any given time, as well as displaying the hours and marking their passage with a chiming bell. The device is no longer in working order. The clock is owned by Korea University Museum ...
Armillary sphere: model of objects in the sky consisting of a framework of rings; Astrarium: timepiece and astronomical prediction device; Astrolabe: astronomical instrument; Astronomical clock: clock with special mechanisms and dials to display astronomical information; Antikythera mechanism: ancient Greek analogue astronomical computer
An armillary sphere in a painting by Sandro Botticelli, c. 1480. Historian Oscar G. Darlington asserts that Gerbert's division by 60 degrees instead of 360 allowed the lateral lines of his sphere to equal to six degrees. [23] By this account, the polar circle on Gerbert's sphere was located at 54 degrees, several degrees off from the actual 66 ...
Santucci's armillary sphere is a Ptolemaic armillary sphere at the Museo Galileo in Florence, the largest existing in the world. [ 1 ] Begun on March 4, 1588, and completed on May 6, 1593, this large armillary sphere was built under the supervision of Antonio Santucci at the request of Ferdinand I de' Medici .
Portrait of Lady Su Hui along with the poem. The Star Gauge (Chinese: 璇璣圖; pinyin: xuán jī tú), or translated as "the armillary sphere chart", is the posthumous title given to a 4th-century Chinese poem written by the Sixteen Kingdoms poet Su Hui for her husband.
The Celestial Sphere (also known as the Armillary Sphere) in the Ariana Park of the Palais des Nations is the best-known of these. The huge—over four-meter-diameter— Celestial Sphere is the chef d'oeuvre of the American sculptor Paul Manship (1885–1966).