Beschreibung : The mission was the first to use the super lightweight external tank (SLWT) which was the same size as the external tank used on previous launches, but 7,500 pounds (3,400 kg) lighter. The tank was made of an aluminum lithium alloy and the tank`s structural design had also been improved making it 30 percent stronger and 5 percent less dense.
These improvements would later provide additional payload capacity to the International Space Station.
Silk cachet with crew portrait. Kennedy Space Center post stamp.

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Weltraumereignis :

STS 91 (DISCOVERY) · MIR EXPEDITION 25 · LAST SHUTTLE / MIR DOCKING