You may have seen it moving swiftly across the night sky, or tracked it using NASA's Spot The Station, and wondered: What is life like on the International Space Station? And who is living on the International Space Station? The ISS is a joint project between the European Space Agency and four partner nations: the United States, Russia, Japan, and Canada.
It makes its home in low Earth orbit approximately 250 miles above the Earth's surface, traveling at just under 5 miles per second - that's approximately 17,000 miles per hour. It is the most expensive single item ever built, costing an estimated $150 billion.
Those lucky enough to board this otherworldly vessel experience spectacular sunrises and sunsets approximately every 45 minutes, and the research on the ISS is conducted in a one-of-a-kind laboratory - outer space. It may even hold the key to humankind's next great space ambition: a mission to Mars with humans aboard. While waiting for that to happen, NASA and astronauts are not shy about answering the question: "What is it like to live on the International Space Station?"