Celebrate Dark Skies This Week, April 22–30 – Sky & Telescope

City lights erase all but the brightest objects in the night sky, as seen in this photo of Tucson, Arizona. Bettymaya Foott Light pollution is “the inappropriate or excessive use of artificial light,” according to the International Dark Sky Association (IDA), the leading champion in the fight to preserve dark skies. This pollution comes in … Read more