The International Space Station (ISS) orbits about 400 kilometers above Earth, circling the planet roughly every 90 minutes. Astronauts aboard the ISS see about 16 sunrises and sunsets every single day.
In microgravity, everyday tasks work differently. Astronauts strap themselves into sleeping bags attached to the wall so they don't float away while resting, and they exercise for about two hours a day on specialized equipment to keep their muscles and bones strong, since the body doesn't have to work against gravity in space.
The ISS is also a science laboratory. Astronauts from many countries conduct experiments in biology, physics, and materials science that would be impossible on Earth, helping researchers understand everything from how plants grow in microgravity to how the human body adapts to long space missions.