The International Space Station (ISS) is a habitable space station that orbits Earth at an average speed of about 28,000 kilometers per hour (17,500 miles per hour). It serves as a laboratory and observatory, where astronauts and cosmonauts conduct experiments in fields such as biology, physics, astronomy, and materials science.
Fun fact: Astronauts on the ISS recycle 93% of water, including moisture from sweat and urine, to ensure a sustainable water supply.