The International Space Station travels at a gravity-defying speed of 27, 600 km/h (7.66 km every second), completing a single orbit every 92 minutes. That means that for every day that passes sedately here on earth, 16 days (i.e. sunrises and sunsets) whip by on the ISS. Along with a great many sunrises, ISS astronauts also experience time dilation due to general relativity: after a 6 month stint whizzing through space at these speeds, astronauts returning home will have aged very slightly less than their earthly counterparts – by 0.005 seconds.
Previous: Are those carrots ‘recycled’