NASA astronauts took a spacewalk outside the International Space Station (ISS) on Tuesday, to grease a robotic arm’s new hand. They replaced the latching mechanism on one end of the 58-ft robot arm last Thursday.
Tuesday’s work involved using a grease gun, which resembles a caulking gun, to keep the latching mechanism working smoothly.
The work is expected to be finished next week, in a third spacewalk.
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