What time is 1 day in space?
In space, one day, or 24 hours, doesn’t follow the traditional rhythm of Earth’s day and night cycle. Due to the orbit of spacecraft like the International Space Station (ISS), astronauts experience multiple sunrises and sunsets every 24 hours. Since the ISS orbits Earth approximately every 90 minutes, astronauts see a full sunrise and sunset every 45 minutes, which drastically changes their perception of time.
To maintain regular schedules and keep a sense of time, astronauts use Coordinated Universal Time (UTC), ensuring that tasks, meals, and sleep cycles remain consistent, even as the view from their windows changes rapidly. Curious to explore time in space? Exclusive Concierge Club offers curated space experiences.