Solar Array Deployment
A 115-foot Solar Array Wing extends from the International Space Station as it orbits 220 miles above Earth. This photo shows a portion of the wing's 32,800 solar cells that produce 32 kilowatts of electricity -- enough to power 16 homes.
On the space shuttle's latest mission to the station, the Atlantis crew delivered the port three and four (P3/P4) integrated truss segment, a 35,000-pound structural support system. Port four includes solar cell arrays similar to the one pictured above, as well as batteries and power conditioning equipment, all developed under the management of NASA's Glenn Research Center. After being deployed on Flight Day 6, the solar arrays will span more than 240 feet.