ISS astronauts to take spacewalk outside space station today

CLPA – via NASA TV

CLPA – via NASA TV

Two American astronauts on Thursday completed a lengthy spacewalk to replace old hoses on the the International Space Station's cooling system and make other equipment upgrades, footage from the U.S. space agency NASA showed.

After taking a short ride on the end of the arm, which was controlled from within the space station by NASA astronaut Scott Tingle, Arnold set about disconnecting and retrieving two jumper cables from near one of the orbiting complex's radiator panels.

Astronauts Drew Feustel and Ricky Arnold ventured outside of the International Space Station for their first spacewalk since their arrival on March 23 aboard the Soyuz MS-08 spacecraft with Russian cosmonaut Oleg Artemyev.

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During their time outside ISS, the duo installed wireless communications antennas on the Tranquility module, replaced a camera assembly on the Port 1 truss and removed suspect hoses from a cooling system. The system is created to take temperature measurements of plants all the way down on Earth. The experiment will measure the temperature of plants on Earth to better understand how much water they need and how they respond to stress.

The astronauts will also conduct maintenance on the station's truss, including removing video cameras and old hoses now mounted on it as part of a cooling component, NASA said. The pair of hoses, which were isolated on an earlier spacewalk, are suspected of being the source of a small ammonia coolant leak and will be returned to Earth for analysis and fix.

Coverage of the walk is expected to begin at 6:30 a.m. EDT as the astronauts prep for their walk and don their spacewalk suits called EMUs or Extravehicular Mobility Units.

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