Light pollution—the needless shining of bright ... leaving the rest of the spectrum free of contaminating light. Shielded low-pressure sodium lamps are used, for instance, in the city of Tucson ...

Also known as photo pollution, light pollution is the presence of artificial ... so look for warm white options rather than the cool white and blue wavelengths of the light spectrum. Warm whites, ...

Are street lights and other skyglow sources affecting your astrophotography? We've rounded up the best light pollution filters for your camera, to help you take advantage of this month's new moon.

The effects of a proposed green-energy facility in Chile could be devastating for some of the most powerful instruments ...

Kyle Norris Peoria, Arizona Light pollution reduction (LPR) filters work because many outdoor lighting sources do not shine evenly across the visible spectrum. Instead, they emit radiation at only ...

Many people are familiar with the idea of greening cities, which involves developing and enhancing urban green spaces. But ...

In the vast timeline of human history, it wasn't long ago that people spent their nights in darkness, relying on moonlight, the glow of a campfire, or, in later years, the dim flicker of kerosene ...