The night sky is a dark place, with only the moon and stars to cast any light. But throughout the long winters high in the northern hemisphere there are nights that are illuminated with spectacular displays of green and blue light dancing across the skies. We are talking, of course, about the Northern Lights. The Aurora borealis, to give them their proper name.
2017 Astronomical Events Check out our calendar of some of 2017's astronomical events for sky watchers. Most of these natural occurrences can be observed with the naked eye but use a pair of binoculars or a telescope for best viewing.