On the ISS, astronauts see 16 sunrises every day as the station circles Earth, but their bodies refuse to follow the 90-minute cycle, forcing crews to stick to a familiar 24-hour routine despite living through multiple days and nights

Astronauts aboard the International Space Station witness 16 sunrises and sunsets each day during their 90-minute orbit around Earth, yet maintain a 24-hour schedule due to their body's biological rhythms. Discover how they manage sleep, work, and on-board light to adapt to their unique environment.

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