Heavens-Above is a non-profit web site developed and maintained by Chris Peat as Heavens-Above GmbH. The web site is dedicated to helping people observe and track satellites orbiting the Earth without the need for optical equipment such as binoculars or telescopes. It provides detailed star charts showing the trajectory of the satellites against the background of the stars as seen when looking up. Special attention is paid to the ISS, Iridium flares, and space shuttle missions. The website also offers information on currently visible comets, asteroids, planet details, and other miscellaneous information. Sky & Telescope magazine described Heavens-Above.com as "the most popular website for tracking satellites."
Ground Track example from Heavens-Above, An observer in Sicily can see the International Space Station when it enters the circle at 9.26pm. The observer would see a bright object appear in the northwest, which would move across the sky to a point almost overhead, where it disappears from view, in the space of 3 minutes.
Users click on a map of the world to set their viewing location. Lists of objects, their brightness and the time and direction to look to see those objects are given. Space stations, rockets, satellites, space junk as well as Sun, Moon and Planetary data are given.