Orbiting a mere 240 miles above the earth, the ISS is the largest space object visible to the naked eye at night. As it passes overhead, it may simply resemble an unusually bright star, or it may give off an orange or golden glow from the sunlight striking its solar power panels.
Tonight and tomorrow, the ISS will pass over much of the United States at night. The best way to view it, according to experts, is with the naked eye or binoculars.
How to find out when you can see the International Space Station in your area
When the International Space Station can be seen in the skies over your area varies. The National Aeronautics and Space Administration has a website that allows you to look up when the ISS and other satellites can be seen.
NASA's Human Space Flight - Realtime Data page contains both a lookup table and an applet called SkyWatch that takes realtime data from NASA's Goddard Space Center and calculates projected flight paths of various space objects, including the ISS.