[NormsRevenge]

NASA image showing the silhouette of the space shuttle Endeavour approaching the International Space Station for docking on February 9. Endeavour astronauts have attached a windowed cupola to the ISS, giving those on board a spectacular view of Earth, as well as additional living and work space. (AFP/NASA)

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Graphic presentation of US space shuttle Endeavour, International Space Station and the Cupola pod. Endeavour astronauts have attached a windowed cupola to the ISS, giving those on board a spectacular view of Earth, as well as additional living and work space. (AFP/Graphic)

[NCC-1701]

There are three panes per window. An inner pane, a middle pressure pane, and an outer debris deflecting pane.The outer panes of glass are designed for on-orbit replacement. The NASA PAO was talking about that last night. Pretty neat. Also, the frame is produced from a single piece of metal. There are no welded seams. that’s to insure pressure integrity of the copula.