... Nauset Light Star Trails . ... Photographed with a camera fixed to a tripod, the well-planned 30 minute exposure records star trails in the northern sky, reflecting the daily rotation of planet Earth. ... That's about 150 light-years at the stellar debris cloud's estimated distance of 3,000 light-years. ... During the Shelios Expedition to Greenland in late August, even veteran sky enthusiasts saw auroras so colorful, so fast changing, and so unusual in form that they could remember nothing like it....