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 ...

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

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, ...

Small, portable telescopes are perfect for setting up quickly and travelling to dark sky sites. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works.

In a groundbreakingrelease on July 7, 2025, NASA showcased extraordinary images from its Hubble and Webb space telescopes that reveal the intricate dynamics of two star clusters, NGC 460 and NGC 456.

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, ...