Image: STS-116 spacewalk 1

Description: English: STS-116 Shuttle Mission Imagery Backdropped by a colorful Earth, astronaut Robert L. Curbeam, Jr. (left) and European Space Agency (ESA) astronaut Christer Fuglesang, both STS-116 mission specialists, participate in the mission's first of three planned sessions of extravehicular activity (EVA) as construction resumes on the International Space Station. The landmasses depicted are the South Island (left) and North Island (right) of New Zealand. Explanation: The International Space Station (ISS) will be the largest human-made object ever to orbit the Earth. The station is so large that it could not be launched all at once -- it is being built piecemeal with large sections added continually by flights of the Space Shuttle. To function, the ISS needs trusses to keep it rigid and to route electricity and liquid coolants. These trusses are huge, extending over 15 meters long, and with masses over 10,000 kilograms. Pictured above earlier this month, astronauts Robert L. Curbeam (USA) and Christer Fuglesang (Sweden) work to attach a new truss segment to the ISS and begin to upgrade the power grid.
Title: STS-116 spacewalk 1
Credit: http://spaceflight.nasa.gov/gallery/images/shuttle/sts-116/html/s116e05983.html http://antwrp.gsfc.nasa.gov/apod/ap061225.html
Author: NASA
Usage Terms: Public domain
License: Public domain
Attribution Required?: No