Early telescopes were all refracting telescopes of the kind Galileo ... had already entered the collective consciousness during the 1600s, but there were challenges in creating mirrors of ...

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.

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 ...

Should you buy a telescope with a refracting lens or a reflecting mirror? It depends on what you want to look at, and your ...

Other telescopic devices are designed to detect objects by the emission or reflection of different types of radiation. Telescopes come in three major optical types: refractor telescopes, reflector ...

The star diagonal fits into the telescope's focuser, and the eyepiece fits into the star diagonal. Most manufacturers that ...

Some of the best telescopes come from Celestron, and they’re on sale from now until Oct. 9. This Celestron deal, part of Amazon’s October Prime Day (aka Amazon Prime Big Deal Days), is perfect ...

Chinese scientists are working to set up the world's largest refracting telescope in Tibet Autonomous Region for observing stars and planets. Deputy Director of the regional department of science and ...

The best telescopes for various purposes and budgets — from beginner to smart telescopes and everything in between. Black Friday is next month, so there's plenty of scope for a great deal.

Whether you want to catch a glimpse of Venus and Mars or take a look at even more distant worlds, the best telescopes for seeing planets will give you the most satisfaction. Planets are a great ...

Explore these orbiting pioneers and learn what they've discovered. 3 min read The Hubble Space Telescope was designed to free astronomers of a limitation that has plagued them since the days of ...