"Shining a Light on Urban Light Pollution: A Simple Hack to Protect Astronomy"

A startup called StealthTransit has developed a solution to combat light pollution caused by LED streetlights. Their technology, called DarkSkyProtector, consists of a device that makes LED lights flicker at a high frequency, a GPS receiver, and a specially designed shutter on the telescope's camera. The system was tested on a 24-inch telescope in the Caucasus Mountains and reduced unwanted sky glow in astronomical images by 94%. The technology could potentially be used to filter out lights from nearby towns and villages as well. While not yet ready for commercial use, StealthTransit hopes to have a product available for larger telescopes in the next five to seven years.