Churches as Scientific Instruments -- Solar observatories built into 17th & 18th century cathedrals. Visit

Virtual Museum of Measuring Engines -- The history of modern astronomical measurement, emphasis on instruments. Visit

Sir Martin Ryle - Nobel Lecture -- Radio telescopes of large resolving power. Visit

Smithsonian Magazine - Stars in Their Eyes -- The exquisite telescopes crafted by Alvan Clark & his sons helped make the last ½ of the 19th century a golden age of astronomy. Visit

Antique Telescopes -- An over view with photographs of many lesser known telescopes typical of their time. Visit

The 28-inch Photo-visual Refractor -- Exhibition from the Royal Observatory, Greenwich, that explains the history of this telescope via words & archive photographs. Visit

Adler Planetarium - Historical Collections -- Collection of instruments, past exhibitions, history department information. Visit

The Astrolabe -- Ancient astronomical computer. Visit

Important Astronomers, their Instruments & Discoveries -- From the merket to the reflecting telescope in three pages. Visit