" ‎(This reference is to a photograph dated Dec. 21st, 2010) ... On the day of the winter solstice, we share this iconic image of Earth's city lights at night. From now until the summer solstice, the days will get longer and longer. Holiday calendar: Celebrate the longest night - John Roach writes ... For those of us who feel as if there's never enough daylight to get all the stuff done that we ne...ed to get done leading up to the holidays, here's a ray of hope: Winter officially begins today in the Northern Hemisphere. That means each day from tomorrow on will get a little bit longer. The longest night of the year is a good time to marvel at how we light up the night. This iconic image, called "Earth at Night," was stitched together from data gathered by a swarm of Defense Department satellites. The "cloudless" view maps the locations of permanent lights on the Earth's surface. It serves as a handy guide for where we live and the state of development around the world.See More "