Photos: Walking above the clouds

Photos: Walking above the clouds

Summary: Space shuttle Discovery astronauts take three space walks to upgrade the space station and test emergency repairs.

TOPICS: Nasa / Space, Cloud

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  • Space station upgrades

    During the second space walk, which lasted for almost seven hours, astronauts Michael E. Fossum (center) and Piers J. Sellers (you can see his backpack right) repaired the Mobile Transporter rail car and delivered a spare pump module for the International Space Station.

  • Fixing tiles

    Astronauts Piers Sellers and Mike Fossum took a third space walk on Wednesday to test procedures for emergency repairs. The two took infrared video to see if damage within the shuttle's reinforced carbon panels could be detected.

  • Applying sealant with putty knife

    The space shuttle brought damaged panels to see if astronauts could repair them in orbit using a substance called NOAX--a pre-ceramic polymer sealant containing carbon-silicon carbide powder. Their tools, a caulk gun and spatulas.

Topics: Nasa / Space, Cloud

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