Astrolabe - Wikipedia
An astrolabe (Ancient 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 half-dome of the sky.
Astrolabe | Definition, History, & Facts | Britannica
2024年12月31日 · astrolabe, any of a type of early scientific instrument used for reckoning time and for observational purposes. One widely employed variety, the planispheric astrolabe, enabled astronomers to calculate the position of the Sun and prominent stars with respect to both the horizon and the meridian.
Astrolabe - World History Encyclopedia
2023年8月31日 · The Astrolabe is an astronomical instrument used from around the 6th century to measure time and position by determining the altitude of heavenly bodies like the Sun and certain stars.
What is an Astrolabe? - St John's College, Cambridge
What is an Astrolabe? Astrolabes are an ancient astronomical instrument. They were first used in ancient Greece, were extensively developed in the medieval Islamic world and became the key astronomical instrument of the western middle ages.
The Astrolabe: Using the Stars for Navigation and Timekeeping …
2019年7月3日 · The Greek astronomer Hipparchus is often credited with inventing the astrolabe, as is the Egyptian astronomer Hypatia of Alexandria. Islamic astronomers, as well as those in India and Asia also worked on perfecting the mechanisms of the astrolabe, and it remained in use for both scientific and religious reasons for many centuries.
Mariam Al Astrulabi: Muslim astronomer and eye of the skies
2023年5月4日 · In the 10th century, a Muslim woman, Maryam Al Ijlya - also known as Mariam Al Astrulabi - changed the face of astronomy forever by pioneering the astrolabe. Her contribution to astronomy was recognised in 1990 when Henry H. Holy discovered the main-best asteroid at Palomar Observatory and named it the 7069 Al Ijliyye.
The Astrolabe: A Mathematical Jewel | UC Geography
Sometimes referred to as an ancient astronomical computer, a “mathematical jewel,” or an analog calculator, the astrolabe is a multi-functional measuring instrument used by astronomers, navigators, and astrologers which enables the user to perform such tasks as telling the time at day or night, surveying, ascertaining the time of sunrise or ...
Ancient astronomers, who aimed to explain all celestial movements by circles travelled at uniform speed, thought the Sun to orbit a point slightly offset from the Earth Daily
Astrolabe: A Beautiful, Mysterious And Sophisticated Computer Of …
2016年7月2日 · The name 'astrolabium' refers to the so-called prismatic astrolabe, invented by the French astronomer André Danjon. The early astrolabe was invented in the Hellenistic civilization by Apollonius of Perga between 220 and 150 BC, often attributed to Hipparchus, a Greek mathematician, geographer, and astronomer who lived in the 2nd century BC.
Astrolabe: Cosmos at hand - Tsinghua University Science Museum
Using the stereographic projection, the astrolabe shows the basic diagram of the two-sphere cosmology. It is a multi-functional instrument integrating observation, demonstration, timing and...