This Black Friday weekend, the Sky-Watcher EvoStar 120 APO Doublet Refractor is 20% off and I think it is a must-buy if you ...

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 ...

(For more on the controversy Galileo spawned, see His Big Mistake.) Building a better refractor The spyglass-turned-telescope had limitations, some of which Galileo was able to design around.

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!

Refracting telescopes can be good for viewing objects ... are more compact (a big plus), but also more complex and expensive.

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 ...

What are the real advantages of big scopes? The larger the telescope's diameter, the more light it will collect. A 4-inch ...

In fact, the kind of travel telescopes that the big brands often sell are surely ... After all, as a refractor telescope it uses a lens to form an image so it’s necessary to stand behind the ...

Reflecting: A reflecting telescope, also called a reflector telescope, is an optical telescope that uses a single or combination of reflective optics, such as curved mirrors, that reflect light and ...