Add Yahoo as a preferred source to see more of our stories on Google. Telescope against a starry night Telescopes gather and focus light using precisely-shaped mirrors and lenses (or a combination of ...

Telescopes are specialist optical instruments that have been around for over 400 years and are useful for many applications including seafaring, military operations and especially stargazing. But not ...

Buying a telescope is a big step, especially if you’re not sure what all those terms — f/ratio, magnification, go-to — mean. So, to eliminate confusion and make sure you understand what you’re buying, ...