Expedition 51 Commander Peggy Whitson and Flight Engineer Jack Fischer of NASA successfully replaced a large avionics box on… https://www.rawpixel.com/image/440349/free-photo-image-nasa-astronaut-adapterFree Image from public domain licenseAstronauts working outside the space station's Quest airlock in Oct 7, 2014. Original from NASA . Digitally enhanced by… https://www.rawpixel.com/image/440335/free-photo-image-nasa-astronomy-alexander-gerstFree Image from public domain licenseNASA astronauts in space - Oct 7th, 2014. Original from NASA. Digitally enhanced by rawpixel. https://www.rawpixel.com/image/440299/free-photo-image-nasa-alexander-gerst-european-space-agencyFree Image from public domain licenseExpedition 51 Commander Peggy Whitson and Flight Engineer Jack Fischer of NASA successfully replaced a large avionics box on… https://www.rawpixel.com/image/440302/free-photo-image-earth-nasa-astronautFree Image from public domain licenseAstronauts working outside the space station's Quest airlock in Oct 7, 2014. Original from NASA . Digitally enhanced by… https://www.rawpixel.com/image/440298/free-photo-image-nasa-alexander-gerst-astronautFree Image from public domain licenseAstronauts working outside the space station's Quest airlock in Oct 7, 2014. Original from NASA. Digitally enhanced by… https://www.rawpixel.com/image/440307/free-photo-image-nasa-alexander-gerst-astronautFree Image from public domain licenseNASA astronauts in space - May 11th, 2013. Original from NASA. 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