Rhenn is a Manila-based content writer with a love for all things geek and pop culture, and science and technology. He has over 1,900 articles to his name, most of which exploring the many dimensions ...

Did you know some of the brightest sources of light in the sky come from the regions around black holes in the centers of galaxies? It sounds a little contradictory, but it's true. They may not look ...

The candela, the international unit of light in use for almost a century, forms the basis of photometry. According to a new ...

When researchers reviewed footage of flying insects, they saw that the bugs tilted their backs toward the source of artificial light. Imperial College London Flip on a porch light on a summer evening ...

High-frequency light is useful. The higher the frequency of light, the shorter its wavelength – and the shorter the wavelength, the smaller the objects and details the light can be used to see. So ...

Unfortunately, this book can't be printed from the OpenBook. Visit NAP.edu/10766 to get more information about this book, to buy it in print, or to download it as a free PDF.

Since its launch in late 2021, the James Webb Space Telescope (JWST) has been glimpsing some of the earliest epochs of cosmic time. Its observations have stretched cosmologists' timelines of when ...

Cities are artificially lit to allow humans to make use of the night. This light pollution means that stars are often barely visible in urban skies. But reduced stargazing is not the only impact of ...

The outdoor world is growing more and more illuminated with artificial light. More than 80 per cent of the world's population lives under a “lit sky”, and in Europe and North America the figure is ...