Why the ISS looks like a plane that never blinks

The International Space Station is the brightest satellite, brighter than any star, and it crosses the sky in 4–6 minutes on a steady straight line. No blinking, no sound, no color change, often fading out high up when it enters Earth's shadow. It is visible from most of the inhabited world in the hour or two after sunset or before sunrise.

The case page checks the ISS (and China's Tiangong station) for every report. If it was up, you will see its path drawn on the Sky Snapshot with the time it peaked and the direction it traveled. The Tonight page lists the next visible passes for your city.