Sir Martin Ryle - Nobel Lecture - http://nobelprize.org/physics/laureates/1974/ryle-lecture.html
Radio telescopes of large resolving power. |
The 28-inch Photo-visual Refractor - http://www.nmm.ac.uk/server.php?request=setTemplate:singlecontent&contentTypeA=conWebDoc&contentId=354&navId=005001004
Exhibition from the Royal Observatory, Greenwich, that explains the history of this telescope via words and archive photographs. |
The Astrolabe - http://astrolabes.org/astrolab.htm
Ancient astronomical computer. |
Virtual Museum of Measuring Engines - http://www.astro.virginia.edu/~afs5z/engines.html
The history of modern astronomical measurement, emphasis on instruments. |