What velocity does the ISS circle the planet at, resulting in frequent sunrises?
Answer
Roughly 17,500 miles per hour.
The crew aboard the International Space Station experiences a rapid cycle of light and dark because the station maintains an incredible orbital velocity of approximately 17,500 miles per hour. This high speed causes the ISS to complete about 16 orbits within a standard 24-hour period, leading the crew to witness a sunrise or sunset roughly every 45 minutes. This rapid visual cycle necessitates a standardized timekeeping method for mission operations to maintain functionality and crew health, contrasting sharply with the Earth-based experience.

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