Though still only in the prototype stage, this flat lens could one day be used on space telescopes, and perhaps even on ...

A rainbow contains all the colours of the visible spectrum. It is often possible to see a secondary bow, which is slightly larger and fainter than the first – and the colours are in the opposite ...

They're your eyes, and they receive signals that fall in the range of visible light ... There's lots to discover in the electromagnetic spectrum. Here's a tour that begins with radio waves ...

Camera manufacturers go out of their way to reduce this to just the visible spectrum in order to produce photos that look right to us. But, what if you want your camera to take photos of the full ...

From Thursday night into early Friday morning, the first total lunar eclipse since 2022 coincided with the full blood moon.

By Lou Feng A photo of a total lunar eclipse, also known as a “blood moon.” The photo was taken during the Jan. 2019 eclipse by NASA’s Hubble Space Telescope.  Courtesy of M. Kornmesser ...