Since ancient times, the night sky has been full of mystery and a source of fascination. Some early civilizations, living under naturally dark skies that are far less familiar to many people today, envisioned the stars as part of a solid dome that touched the Earth at the horizon. It’s easy to see why: True outdoor darkness has a depth you can sink into, with innumerable pinpricks of light embedded in the blackness. Capturing the magic of this darkness and the price of its rapid loss to artificial light are…