This was the first working reflecting telescope. Other designers proved unable to grind mirrors with a regular curvature, so the reflector remained largely a curiosity until the mid-18th century ...

After years of development, researchers at the Daniel K. Inouye Solar Telescope in Hawaii have fired up their newest tool, ...

The first telescopes used lenses ... flown aboard balloons or aircraft need to be compact. Although reflecting telescopes can ...

New James Webb Space Telescope (JWST) images have captured auroras on Neptune for the first time ... much fainter at cold temperatures, and light reflecting off Neptune's clouds may have drowned ...