THE Yerkes Observatory, which has recently been completed and inaugurated, contains in its instrumental equipment the largest refractor in the world, the diameter of the object-glass spanning 40 ...

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 ...

Well, any of us who has ever looked through a telescope could say the same, for the two principal types in use today were developed by giants: the refractor by Galileo and the reflector by Newton.

Established in 1897 by the University of Chicago, this historical site is home to the world's largest refracting telescope and has played a pivotal role in astronomical breakthroughs, including ...

Refracting telescopes dominated the nineteenth century ... low-noise wavefront sensors, and large high-deformation and small high-actuator-density deformable mirrors. To obtain a good image ...

This year Greenwich Observatory is set to celebrate its 350th anniversary, since it was first constructed in 1674.