Stars appear to rotate around Polaris, the north star (C, top), in this time exposure, 26 January, 2006, above a view of the 4-meter telescope dome at Kitt Peak National Observatory near Tucson, Arizona. The image is composed of 114 30-second exposures of the night sky combined to make the equivalent of a nearly one hour exposure in which the earth's rotation causes the stars to appear to move across the night sky. The orange glow on the horizon is from the city of Phoenix, 100 miles (160 Km) away. Photo credit should read STAN HONDA/AFP via Getty Images
The universe has a crazy-quilt explosion of stars to show us each night. But if you live in an urban area, light pollution obscures it with a glowing washout.