Introduction The Museum of the History of Science houses the world's largest and most important collection of astrolabes. With ancient origins and a two thousand year history, the astrolabe illuminates astronomy, time-telling, astrology and religion across cultures, time and place. The Museum's collection ranges from India and the Middle East to Europe, with many unique and significant examples. This website has two sections: MHS Astrolabe home page
Applet: Gunter's Quadrant Gunter's Quadrant Applet See instructions for interactive use below Quadratum Horarium Generale (Regiomontanus Dial) Apian Dial Capuchin Dial Visit my Applet Collection
is a fully animated planetarium program in the form of a planispheric astrolabe. The singular advantage of the astrolabe display is that it shows most of the sky, both visible and invisible, on a single screen. Unlike a static instrument, can be set for any location, date and time and includes accurate positions of the Sun, Moon, and planets. The Electric Astrolabe
personal astrolabe The Astrolabe: the original astronomical computer The Personal Astrolabe from Janus is an inexpensive astrolabe recreation that makes the joys and mysteries of the astrolabe available to everyone. Most astrolabe reproductions are intended to teach you a little about astrolabes but are not intended to be used. The Personal Astrolabe teaches you about astrolabes, and is also a useful instrument.
The Astrolabe: An instrument with a past and a future The astrolabe is a very ancient astronomical computer for solving problems relating to time and the position of the Sun and stars in the sky. Several types of astrolabes have been made. By far the most popular type is the planispheric astrolabe, on which the celestial sphere is projected onto the plane of the equator. A typical old astrolabe was made of brass and was about 6 inches (15 cm) in diameter, although much larger and smaller ones were made. The Astrolabe