The journey of astronomical telescopes began in the early 17th century when Galileo Galilei crafted his first refracting ...

From magnification to light-gathering, here’s how to make the decision between buying a telescope or a monocular for ...

Use precise geolocation data and actively scan device characteristics for identification. This is done to store and access ...

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.

It was soon realized that what was to become known as chromatic aberration was a limiting factor in refracting telescopes, and that this could be overcome by making lenses with longer focal length ...

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 ...

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

McKim Observatory still houses many of its original instruments, including a 9.53 inch Clark Refractor telescope, a meridian transit telescope, and a gravity driven chronograph. Missing from the early ...

View Deal Gskyer Telescope 70mm: was $130 now $97 at Amazon Save 25% on the Gskyer 70mm Alt-az refractor telescope at Amazon. This refractor comes complete with all the accessories a beginner ...

The second floor consists of the Equatorial Room which is home to the star of McKim Observatory: a Clark Refracting Telescope with a 9.53” objective lens made by the renown Alvin Clark and Sons. The ...

The Beaverlab Finder TW2 is not a smart telescope, but its design makes it unique. This 82mm/3.2-inch refractor is one of a kind in that a lightweight plastic camera can be attached to it in place ...