Video: two NASA astronauts go on their first spacewalk outside ISS

Two American NASA astronauts stepped out of their comfort zone inside the International Space Station (ISS) to begin their firs ever spacewalk.

In a post on its Facebook page, NASA said, "US astronauts Scott Kelly and Kjell Lindgren will venture outside the space station's Quest airlock on Wednesday, Oct. 28 to perform a spacewalk in support of space station assembly and maintenance, 189th of the space station." Watch the video of spacewalk:

The spacewalk is the 32nd US spacewalk, and focussed on station upgrades and maintenance tasks, including installing a thermal cover on the Alpha Magnetic Spectrometer, which is a state-of-the-art particle physics detector that has been attached to the station since 2011."

The spacewalk lasted for 7 hours and 16 minutes wherein the two astronauts performed routine maintenance and upgrades on the ISS.