Facts about the International Space Station, including its partner countries and life aboard it.
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- When did the first ISS module, Zarya, launch?
- November 20, 1998
- Which country launched the first ISS module?
- Russia
- How many countries are main partners in the ISS?
- Five
- How many people typically live on the ISS at once?
- Six astronauts
- How long does a typical ISS crew assignment last?
- About six months
- What is the ISS orbital altitude?
- Approximately 408 kilometers (about 253 miles)
- How fast does the ISS travel in orbit?
- About 28,000 kilometers per hour
- How many times does the ISS orbit Earth in 24 hours?
- About 16 times
- How many sunrises and sunsets does an ISS astronaut experience per day?
- 16 (eight of each)
- How many large modules make up the ISS structure?
- 16 pressurized modules
- What is the approximate length of the ISS?
- 109 meters (about 357 feet)
- What is the approximate width of the ISS?
- 73 meters (about 239 feet)
- How much does the ISS weigh?
- About 420,000 kilograms (925,000 pounds)
- What is the total interior volume of the ISS?
- About 32,000 cubic meters
- What is the primary energy source for the ISS?
- Solar panels (photovoltaic arrays)
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