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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 ...
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 .
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 ...
Booklet “The Dutch 17th Century in Etchings” for the exhibition of Rembrandt at the United Nations by Museum Geelvinck Hinlopen Huis (with the project proposals by Maecenas World Patrimony Foundation ((www.maecenasworldpatrimony.org) “Contribute to the Cycle of Life – the restoration of the Armillary Sphere”, Geneva.
Copy of Verbiest's celestial sphere on display at the Ferdinand Vebiest Institute of the Katholieke Universiteit Leuven. Ecliptic armilla, armillary sphere, six feet in diameter, used to measure the ecliptic longitude difference and latitudes of celestial bodies. This was the traditional European device while the Chinese had developed the ...
The Jagiellonian globe, also known as the Globus Jagellonicus, is a mechanical armillary sphere made in France before 1510. It is an astronomical instrument and a universal clock tracking both local solar time and sidereal time. The central brass sphere is engraved with a map of Earth and contains the clock mechanism.
Armillary sphere, 1557. Girolamo della Volpaia (ca. 1530 – 1614) was an Italian maker of clocks and scientific instruments from Volpaia.. Girolamo continued the business of his father Camillo della Volpaia (1484-1560) and his uncles Benvenuto della Volpaia (1486-1532) and Eufrosino della Volpaia (late 15th century - 16th century), who were an important family of craftsmen in Tuscany.