NASA is embarking on a six-and-a-half hour spacewalk to install a protective shield at the International Space Station, and it’s inviting fans to tune in and watch the action. With coverage starting at 6.30 a.m. Eastern time on Friday, Peggy Whitson and Jack Fischer will undertake the station’s 200th spacewalk.

Fischer, who is wearing a suit with no stripes, is undertaking his first ever spacewalk. Whitson, who is wearing a suit with red stripes, holds the record for most spacewalks by a female American astronaut. Whitson is also the first woman to command the ISS, a feat achieved in 2008, and holds the record for most time an American has spent in space.

The pair will move through the Quest airlock to replace an avionics box used for science experiments, while also installing a connector to route data through the alpha magnetic spectrometer. This work will enable the crew to work out the best way to carry out maintenance on the cosmic ray detector. Scientists hope that the detector will lead to a better understanding of these mysterious rays, as the instrument will be able to operate without atmospheric interference.

The two crew members will then install a protective shield on Pressurized Mating Adaptor-3, which will allow for a new docking port to attach for commercial crew. The adaptor’s micrometeoroid debris shield floated away earlier this year, when Whitson was working with Shane Kimbrough on readying the adaptor for use. The adaptor will enable companies like SpaceX and Boeing to visit the station, making it an important port for the future of space exploration.

story continues below

NASA completed its first ISS spacewalk on December 7, 1998, just 17 days after the space station first launched. Jerry Ross and Jim Newman attached the first two components to the station, the Russian Zarya module and the U.S. Unity module.

Watch the spacewalk live from NASA’s website here.

Photos via NASA