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 ...

Still, with large aperture models now available ... a monocular is essentially a miniature refracting telescope. It has a single eyepiece, like a telescope, and an objective lens, but in between ...

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.

Make the most of January's new moon and survey the darkened skies with the best telescopes. Our guide will help you choose the right scope, no matter your budget or experience. Are you new to ...

Refractor telescopes use specialised lenses to gather and focus light into an image, displaying a magnified sky view. In contrast, reflector telescopes use curved mirrors to reflect light onto the ...

A refractor telescope on a fold-up tripod that ships ... to take panoramic photos of the night sky to best capture iconic large objects in the deep sky, such as the Andromeda Galaxy.

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 ...

Refractors usually need a star diagonal ... What are the sizes of “small,” “medium,” and “large” telescopes? I can’t speak for every reference to small, medium, or large telescopes ...