For anyone interested in watching satellites pass silently overhead, the Heavens Above website is your best source of predictions. This page is the direct links to Heavens Above's predictions for International Space Station (ISS) and Iridium passes. Iridium is a constellation of communication satellites. Users of the system use phones similar to cell phones, but their cell phone towers are orbiting 400 miles overhead. Because of the reflective antennas on each Iridium satellite, they can flash brightly as they pass overhead. In fact, their flashes are sometimes bright enough to see during daylight!
