The International Space Station orbits Earth every 92 minutes at a speed of 17,500 mph. It has 5 major parts including solar arrays, a science lab, command center, habitat, and docking port. Astronauts follow a daily schedule that includes exercise, meal times, science experiments, and sleep. They train underwater and receive supplies from resupply spacecraft. Various experiments are conducted on the ISS, including growing plants and microgravity experiments. Astronauts must exercise daily to prevent muscle and bone loss in the microgravity environment. They sleep in attached sleeping bags and wear comfortable, reusable clothes.