WATCH LIVE NOW: Astronauts Spacewalking Outside Space Station

Astronauts at the International Space Station are spacewalking today to complete power upgrades to the station's power system. NASA astronaut Shane Kimbrough and European Space Agency astronaut Thomas Pesquet, a first-time spacewalker, kicked off their spacewalk at 6:22 a.m. EST (1122 GMT), more than 30 minutes ahead of schedule. The spacewalk will last about 6.5 hours. Live coverage of the spacewalk will stream live on NASA TV. The live stream will also appear in the space below court