NASA astronauts successfully completed the 2nd spacewalk of October series

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It was the fourth spacewalk for Bresnik in his career and the second for Mark Vande Hei.

On Tuesday, NASA astronauts #Randy Bresnik and Mark Vande Hei ventured out of the International Space Station (ISS) to install a new high-definition (HD) video camera outside the orbiting post.

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This was the second #spacewalk of these astronauts in the last five days. NASA astronaut Joe Acaba and European Space Agency astronaut Paolo Nespoli will help the spacewalkers get suited up and out the door.

Bresnik's first objective during this spacewalk will involve "rotating a spare pump flow control subassembly that's located on the external stowage platform 1 (ESP-1) ... to set up for a future ammonia vent of that unit and eventual relocation", Judd Frieling, NASA's spacewalk flight director, said at a news conference Monday (Oct. 2).

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On their spacewalk Thursday, the pair replaced the latching end of the 57-foot-long (17-meter) Canadian-made arm, called Canadarm2.On Tuesday, they lubricated its latching end effector.

The lubrication work included the use of grease gun to grease the big robotic arms' new hand and keep the latching mechanism working smoothly. The first spacewalk was successfully completed on October 5, by both Bresnik and Vande Hei. Actually, the latches, or hands, are located on each end of the Canadian-built robot arm, and they are used to grab the arriving United States cargo ships and also enable the robot arm to move around the orbiting lab.

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Bresnik will conduct another spacewalk October 18 with NASA astronaut Joe Acaba to finalize the servicing on the Canadarm2 robotic arm. During next spacewalk on October 18, astronauts will replace another old camera nicknamed "Old Yeller" that is tinting images yellow.

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