

The pale blue Earth serves as a backdrop for astronaut Michael Gernhardt, who is attached to the Shuttle Endeavour's robot arm during a spacewalk on the STS-69 mission in 1995. Unlike earlier spacewalking astronauts, Gernhardt was able to use an electronic cuff checklist, a prototype developed for the assembly of the International Space Station.
Image Credit: NASA
http://www.nasa.gov/multimedia/imagegallery/image_feature_313.html