Building a better refractor The spyglass-turned-telescope had limitations ... Galileo ground a lens larger than he needed, for example. He then placed cardboard around the edges of the lens ...

The original instrument to occupy the 25-foot diameter dome was the 10.5-inch Bausch refracting telescope (f/15.5) installed in the brand new observatory in 1953. Bausch & Lomb Company gave the ...

Refracting telescopes dominated the nineteenth century ... are aiming at solving problems in adaptive optics. Some examples include better sky coverage by use of laser 'guide stars' (reference ...

McKim Observatory is an excellent example of a late 19 th-century American observatory ... The second floor consists of the Equatorial Room which is home to the star of McKim Observatory: a Clark ...

Chinese scientists are working to set up the world's largest refracting telescope in Tibet Autonomous Region for observing stars and planets. Deputy Director of the regional department of science and ...