Mondo Knows Facts

The International Space Station orbits Earth every 90 minutes

Travelling at 28,000 kilometres per hour astronauts see sixteen sunsets every day

Orbiting roughly 400 kilometres above Earth's surface, the International Space Station travels at a speed of about 27,600 kilometres per hour. At this high velocity, the station completes a full revolution around Earth every 90 minutes, allowing crew members to witness 16 sunrises and sunsets every 24 hours.

STS-134 International Space Station after undocking
NASA ยท Public domain ยท source

Where this comes from

NASA Science

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Tags: iss, orbit, space station

The International Space Station orbits Earth every 90 minutes: the short answers

Where does this come from, and can I check it?
Travelling at 28,000 kilometres per hour astronauts see sixteen sunsets every day. The figure is taken from NASA Science, which is linked in full on this page. Every fact on Mondo Knows names its source rather than repeating an unsourced claim.
Is this really a space fact?
Yes. It sits on the Space shelf, one of 1,090 sourced facts grouped into space, animals, the human body, history, science and more. Category pages collect every fact in the same field.
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The links under the fact point to a quiz, game, puzzle or calculator on the same subject, and the shelf below shows related facts. The wording here is original, and quoted phrases are marked as quotations.