The first telescopes, known as refracting telescopes, were built in the early 17th century by Dutch eyeglass makers. They employed a pair of lenses—one convex fitted at the end of the scope, and one ...

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, ...

IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more. Reflecting telescope made in the ...

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, ...

The best telescopes for professional astrophotography will allow you to capture high-definition images of planets, nebulas and galaxies. When you purchase through links on our site, we may earn an ...

For the first time, a flat telescope lens has been produced that represents colors accurately, offering a way to make less ...

The startup Reflect Orbital aims to keep solar farms running at night by reflecting sunlight from space and has sparked ...

Our picks of the best small telescopes are all under 10kg, making them perfect for traveling to dark sky sites — check out the best models ahead of Black Friday. When you purchase through links on our ...