Today is your last day to save serious money on telescopes, but you'll have to be fast, here are 9 you won't want to miss!

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.

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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 ...

Looking for a great gift for a young skywatcher? This Celestron Astromaster 70AZ is a fun starter telescope and it's 15% off ...

Description: Specifications TV - 76TypeAPO (Doublet) Refractor (Elements/Groups: 2/1) Objective (mm) 76 Focal Length (mm) 480 Focal Ratio (f/#) 6.3 Drawtube/Focuser2-in ch, Focusmate dual-speed ...

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 ...

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 standard telescope of Newton's time, the refracting telescope, was not ideal. Its glass lenses focused the different colors inherent in light at different distances. This resulted, at 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 ...

The latter is to make it 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 behind the optical tube ...