Walter Adams helped  design the 60 and 100 inch ones at Mount Wilson.
In old school anti-aircraft batteries, two of these objects made up the Brocq electronic corrector. Chester  Moor Hall and John Dollond independently discovered how to overcome one limitation of these devices by  using two different materials in their construction. James Bradley that these objects need to be tilted to  account for an effect modeled as tan alpha equals v over c. Jean Picard attached one of these to a quadrant to  aided in his angle determination efforts. In the Cavendish experiment, one of these devices was used to measure  the torsion balance. One type of these objects was improved by adding a hyperbolodial plate, a technique introduced  by Cassegrain. It is often claimed that this device was invented by Johannes Lippershey. Walter Adams helped  design the 60 and 100 inch ones at Mount Wilson. Newton invented the reflecting type which worked the light using  mirrors as opposed to lenses. For 10 points, name these optical devices used to discover objects like the Gallilean  Satellites and Pluto.
In old school anti-aircraft batteries, two of these objects made up the Brocq electronic corrector.
telescopes