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Reference.com Web Directory
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Web Sites
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.
Caltech Astronomy - History - The telescopes at Mt. Wilson and Palomar.
Churches as Scientific Instruments - Solar observatories built into 17th and 18th century cathedrals.
Sir Martin Ryle - Nobel Lecture - Radio telescopes of large resolving power.
The 28-inch Photo-visual Refractor - Exhibition from the Royal Observatory, Greenwich, that explains the history of this telescope via words and archive photographs.
The Astrolabe - Ancient astronomical computer.
Virtual Museum of Measuring Engines - The history of modern astronomical measurement, emphasis on instruments.