Mike Hopkins  was one of two NASA astronauts, their spacesuits rigged with snorkels in case of a water leak, who floated outside the International Space Station for 5 1/2 hours on Saturday, successfully completing the first steps to fix the outpost's cooling system. (Reuters/NASA/Handout)

As the rest of us sit on our couches sipping egg nog this Christmas Eve, astronauts Rick Mastracchio and Mike Hopkins are conducting a second spacewalk to repair a broken control valve on the International Space Station. The walk began at 6:53 a.m. Eastern. As of 10:50 a.m., the station was 260 miles above the south Pacific Ocean.

Live streaming video by Ustream

The situation involving the station's broken cooling system is considered urgent, but as of Sunday the work was way ahead of schedule — giving the astronauts some spare time to take these photos:



According to NASA, only one other Christmas Eve spacewalk attempt has ever been made.