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The Verona astrolabe is an archaeological discovery unearthed in the vaults of a museum in Verona, Italy. [1] Dating back to the eleventh century, this Islamic astrolabe is one of the oldest examples of its kind and is among the few known to exist worldwide. It appears to have been employed by Muslim, Jewish, and Christian communities spanning ...
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 ...
The first known metal astrolabe in Western Europe is the Destombes astrolabe made from brass in the eleventh century in Portugal. [ 27 ] [ 28 ] (p 140) Metal astrolabes avoided the warping that large wooden ones were prone to, allowing the construction of larger and therefore more accurate instruments.
The Canterbury Astrolabe Quadrant is a medieval astrolabe believed to date from 1388, and which was found in an archaeological dig at the House of Agnes, [1] a bed and breakfast hotel in Canterbury, Kent, England, in 2005. The Canterbury Astrolabe Quadrant is the only one of its kind known to have been definitely made in England. [2]
The earliest known description of a planetary equatorial is contained in early 11th century treatise by Ibn al-Samh, preserved only as a 13th-century Castillian translation contained in the Libros del saber de astronomia (Books of the knowledge of astronomy); the same book contains also a 1080/1081 treatise on the equatorial by Al-Zarqali. [85]
The mathematician Claudius Ptolemy 'the Alexandrian' as imagined by a 16th-century artist. The Planisphaerium is a work by Ptolemy.The title can be translated as "celestial plane" or "star chart".
The fact of having engraved the date 980 AD. and the latitude of Barcelona (41–30), which archdeacon in those dates was Sunifred Llobet, to whom is attributed the authorship of the Ripoll manuscript: ms.225, which contains the description of an astrolabe, has led the scholars to attribute the paternity of the astrolabe to this famous astronomer.
The mariner's astrolabe, also called sea astrolabe, was an inclinometer used to determine the latitude of a ship at sea by measuring the sun's noon altitude (declination) or the meridian altitude of a star of known declination. Not an astrolabe proper, the mariner's astrolabe was rather a graduated circle with an alidade used to measure ...