Carolyn Collins Petersen
About.com Space / Astronomy
Have you ever heard of light pollution? It's the overuse of light at night. Nearly everyone on Earth has experienced it. Cities are bathed in light, but lights also encroach on the wilderness and rural landscapes as well. The International Dark-Sky Association is a leading authority on light pollution, its causes, and ways to reduce it while preserving safety and security. Check out their Web site, and their video "Losing the Dark", available to watch on Youtube and Vimeo, and downloadable for educators, planetariums, and other outreach professionals.
Want to see some planets after sunset this week? Look to the south-southwest for a view of Mars and Saturn. You'll also be able to spot a nice crescent Moon appearing near the planets on the nights of the 1-4th.