Though still only in the prototype stage, this flat lens could one day be used on space telescopes, and perhaps even on ...

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.

If your search to the best telescope for stargazing has led to a world of jargon and confusion, we're here to help. A refractor or refracting telescope uses an objective lens to collect light and ...

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 ...