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Astronomy in China has a long history. Detailed records of astronomical observations were kept from about the 6th century BC, until the introduction of Western astronomy and the telescope in the 17th century. Chinese astronomers were able to precisely predict eclipses. Much of early Chinese astronomy was for the purpose of timekeeping.
Early depiction of a "Dutch telescope" from 1624. The history of the telescope can be traced to before the invention of the earliest known telescope, which appeared in 1608 in the Netherlands, when a patent was submitted by Hans Lippershey, an eyeglass maker. Although Lippershey did not receive his patent, news of the invention soon spread ...
1732 – Indian observatories of Sawai Jai Singh at Varanasi, Ujjain, Mathura, Madras. 1733 – Chester Moore Hall invents the achromatic lens refracting telescope. 1734 – Indian observatory of Sawai Jai Singh at Jaipur. 1753 – Real Observatorio de Cádiz (Spain) 1753 – Vilnius Observatory at Vilnius University, Lithuania.
A modern astrolabe made in Tabriz, Iran in 2013. An astrolabe (Greek: ἀστρολάβος astrolábos, 'star-taker'; Arabic: ٱلأَسْطُرلاب al-Asṭurlāb; Persian: ستارهیاب Setāreyāb) is an astronomical instrument dating to ancient times. It serves as a star chart and physical model of visible heavenly bodies.
Johannes Hevelius[note 1][note 2] (in German also known as Hevel; Polish: Jan Heweliusz; 28 January 1611 – 28 January 1687) [1] was a councillor and mayor of Danzig (Gdańsk) , in the Polish–Lithuanian Commonwealth. [2] As an astronomer, he gained a reputation as "the founder of lunar topography ", [1] and described ten new constellations ...
830 CE. The first major Arabic work of astronomy is the Zij al-Sindh by Muhammad ibn Musa al-Khwarizmi. The work contains tables for the movements of the Sun, the Moon, and the five planets known at the time. The work is significant as it introduced Ptolemaic concepts into Islamic sciences. This work also marks the turning point in Arabic ...
1860 — Georg Simon Plössl produces his eponymous eyepiece. 1880 — Ernst Abbe designs the first orthoscopic eyepiece (Kellner's was solely achromatic rather than orthoscopic, despite his description). 1897 — Largest practical refracting telescope, the Yerkes Observatorys ' 40 inch (101.6 cm) refractor, is built.
In the early 1980s it was placed in storage. [3] The focal length of the telescope has been quoted as 6 feet 2 + 1 ⁄ 2 inches (1.892 meters) in one source, [3] but according to another it is 8 feet 2 inches (2.49 meters). [5] The telescope tube was made of wood. [6] An 1840 report from the Observatory noted of the new Sheepshanks telescope: [7]