Going on the trail of stars from space, astronaut Don Pettit aboard the International Space Station captured these beautiful long exposure shots of star trails as seen from the ISS. Don says the photographs represent a time exposure of 10 to 15 minutes, but since modern cameras allow at best a 30 second exposure, these images we see are a result of a stack of multiple 30-second exposure images stacked together.
Via LaughingSquid
