This is a combination of a array of images photographed from a mounted camera on a Earth-orbiting International Space Station, from approximately 240 miles above Earth. Expedition 31 Flight Engineer Don Pettit pronounced of a about detailed techniques used to grasp a images: “My star route images are done by holding a time bearing of about 10 to 15 minutes. However, with complicated digital cameras, 30 seconds is about a longest bearing possible, due to electronic detector sound effectively snowing out a image. To grasp a longer exposures we do what many pledge astronomers do. we take mixed 30-second exposures, afterwards ‘stack’ them regulating imaging software, so producing a longer exposure.” A sum of 18 images photographed by a astronaut-monitored still camera were total to emanate this composite.
Image Credit: NASA