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.

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 ...

View the planets and night skies from home - Heavens above! Your guide to the best telescopes for stargazing, created for all astronomy enthusiasts ...

Refracting telescopes use lenses - combining at least ... The primary mirror's curve is ground to a simple shape, usually a sphere. Ordinarily, a spherical mirror would introduce aberrations ...

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 ...

They comprise a very simple finder scope ... more convenient to view images high up in the sky. After all, as a refractor telescope it uses a lens to form an image so it’s necessary to stand ...

The Seestar S50 is an affordable smart telescope, operated solely via a smartphone app, that makes basic astrophotography simple and accessible ... this small refractor on a motorized mount ...