Astronauts Peggy Whitson and Jack Fischer put on spacesuits Friday to head outside the International Space Station for several fix and maintenance tasks, but the duo will likely only complete part of their work after a leaky cooling umbilical delayed the start of their spacewalk.
Friday's spacewalk will last 6 and a half hours and will be streamed here.
This is the 200th spacewalk devoted to station assembly and maintenance since construction began in 1998, the fifth so far this year, the first for Fischer and the ninth for Whitson, who is working through her third long-duration stay aboard the laboratory, her second stint as commander.
However, the two of them are out now and moving around seemingly without issue in order to remove a busted avionics box and install a new one before coming back into the station.
The spacewalk was briefly delayed after NASA discovered a water leak in equipment that helps power their spacesuits. The hose provides water, power, cooling and communications for astronauts before they float outside. Whitson, on the other hand, has performed more spacewalks than any other woman.
The spacewalk officially began at 9:08 a.m. EDT.
"The biggest slice of awesome pie I've ever seen", said Fischer, using one of his favorite expressions to describe the scene. He also writes a blog, called Orbital Velocity, about the space station. Fischer s suit itself is perfectly fine.
NASA reports that Whitson is the USA record holder for spacewalks done by a woman, and this will be her ninth trip outside of the space station.
NASA is providing live coverage of the spacewalk over at NASA TV.
Today's spacewalk builds on a historic career for Peggy Whitson. NASA is especially wary of leaks involving spacesuits.
The station orbits the Earth at a height of about 250 miles (400 kilometers), circling the planet every 90 minutes at a speed of about 17,500 miles (28,000 kilometers) per hour.