The International Space Station travels fast enough that its crew pass through sixteen sunrises and sixteen sunsets in the course of a single day. At an altitude of roughly 400 kilometres it moves at about 28,000 kilometres an hour, which works out to one full lap of Earth roughly every ninety minutes. NASA puts it [...] The post The International Space Station circles the planet so fast that the crew watch the sun rise and set sixteen times in a single day, a new dawn roughly every ninety minut