See also:

• Reference: Time: Horology  (23)
• Science: Earth Sciences: Geomatics: Navigation: History  (12)

• Adler Planetarium - Historical Collections - Collection of instruments, past exhibitions, history department information.
• Antique Telescopes - An overview with photographs of many lesser known telescopes typical of their time.
• The Astrolabe - Ancient astronomical computer.
• Caltech Astronomy - History - The telescopes at Mt. Wilson and Palomar.
• Churches as Scientific Instruments - Solar observatories built into 17th and 18th century cathedrals.
• The 28-inch Photo-visual Refractor - Exhibition from the Royal Observatory, Greenwich, that explains the history of this telescope via words and archive photographs.
• Sir Martin Ryle - Nobel Lecture - Radio telescopes of large resolving power.
• 400th Anniversary of the Invention of the telescope - Circumstances of the invention, instructions for making a model, and commemorative events in Middelburg, the Netherlands. [Dutch and English]
• Virtual Museum of Measuring Engines - The history of modern astronomical measurement, emphasis on instruments.