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 ...

Early telescope makers, such as John Dollond, patented and commercially produced achromatic refracting telescopes, significantly improving upon earlier designs by reducing color fringing. Henry Fitz ...

Yerkes Observatory, in Williams Bay, Wisconsin, houses the largest refracting telescope ever built for astronomical research, with a main lens that's 40 inches (1.02 meters) in diameter. The ...

Looking Up is transcribed using a combination of AI speech recognition and human editors. It may contain errors. Please check the corresponding audio before quoting in print. Dean Regas: Edwin Hubble ...

It’s likely that humans have looked up in wonder at the night sky since we first walked the earth, but now it’s easier than ever to get a good view. Telescopes for beginners are relatively affordable ...

There are few places in Wisconsin that can claim as many discoveries as the Yerkes Observatory near Lake Geneva. The Observatory is more than a century old and houses the world’s largest refracting ...

This lightweight 2.7-inch/70mm achromatic refractor uses its relatively long length to produce natural-looking views of planets and the moon, but with anything else it’s underwhelming. It’s also ...