Eye in the Sky

As the sun set over Tucson, man-made satellites silently passed overhead, as they do almost everywhere on Earth. Many can be seen just after sunset or just before sunrise every day. The bright one visible as the nearly verticle line in this image is a U. S. military spy satellite called "Lacrosse 5". This satellite was heading south in its orbit. Another, unidentified satellite can be seen heading to the north east, as a faint line soming out of the top of the Schmidt dome. The crescent moon illuminates the scene. Canon 20D - 20mm @ f/1.8, ISO 200