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About the International Space Station
The International Space Station is a modular space station in Low Earth Orbit, jointly operated by NASA (United States), Roscosmos (Russia), JAXA (Japan), ESA (Europe), and CSA (Canada). It is the largest artificial object in orbit and the largest crewed spacecraft ever constructed, visible to the naked eye from Earth as a bright, steady light moving across the night sky.
The first module, Zarya, was launched on 20 November 1998. Since Expedition 1 in November 2000, the ISS has been continuously occupied for over 25 years — the longest continuous human presence in space. It has hosted over 270 visitors from 21 countries and supported thousands of scientific experiments. See our full ISS profile and complete modules guide for more.
The station orbits at approximately 410–420 km with an inclination of 51.64°, completing one orbit every 92 minutes at 7.66 km/s. The crew experiences 16 sunrises and sunsets every day. The ISS is the third-brightest object in the night sky, reaching magnitude −3 to −5 during favourable passes. You can also track Starlink satellites and other bright objects with Orbital Radar.
Its inclination means the ISS passes over roughly 90% of Earth's population. Most people can see it several times per week with the naked eye under the right conditions. For tips, see our guide on how to see the ISS tonight, or learn how to photograph it.