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The word planisphere (Latin planisphaerium) was originally used in the second century by Ptolemy to describe the representation of a spherical Earth by a map drawn in the plane. [ 2 ] Planisphere
Philips' Planisphere, ca. 1900. In astronomy, a planisphere (/ ˈ p l eɪ. n ɪ ˌ s f ɪər, ˈ p l æ n. ɪ-/) is a star chart analog computing instrument in the form of two adjustable disks that rotate on a common pivot. It can be adjusted to display the visible stars for any time and date.
11th century – Planisphere invented by Biruni [7] 11th century – Universal latitude-independent astrolabe invented by Abū Ishāq Ibrāhīm al-Zarqālī (Arzachel) [8] 1023 – Hamedan observatory in Persia; c. 1030 – Treasury of Optics by Ibn al-Haytham (Alhazen) of Iraq and Egypt; 1074–92 – Malikshah Observatory at Isfahan used by ...
Planisphere or Planisphaerium, a 2nd-century AD book by Claudius Ptolemy about mapping the celestial sphere onto a flat plane using the stereographic projection to make a star chart Planispheric astrolabe , a device consisting of a planisphere joined to a dioptra, used for observing stars and performing astronomical calculations
The Ebstorf Map was an example of a European mappa mundi, made by Gervase of Ebstorf, who was possibly the same man as Gervase of Tilbury, [28] some time in the thirteenth century. It was a very large map: painted on 30 goatskins sewn together, it measured about 3.6 m × 3.6 m (12 ft × 12 ft).
A celestial map by the Dutch cartographer Frederik de Wit, 1670. A star chart is a celestial map of the night sky with astronomical objects laid out on a grid system. They are used to identify and locate constellations, stars, nebulae, galaxies, and planets. [1]
The spherical astrolabe was a variation of both the astrolabe and the armillary sphere, invented during the Middle Ages by astronomers and inventors in the Islamic world. [b] The earliest description of the spherical astrolabe dates to Al-Nayrizi (fl. 892–902).
The stereographic projection, also known as the planisphere projection or the azimuthal conformal projection, is a conformal map projection whose use dates back to antiquity. Like the orthographic projection and gnomonic projection , the stereographic projection is an azimuthal projection , and when on a sphere, also a perspective projection .