Christmas Eve Space Walk (7:10 a.m.) Television coverage on NASA TV network

from Space dot-com -- posted Dec. 23, 2013 NASA astronauts Rick Mastracchio and Mike Hopkins will don their spacesuits and float out into the weightless wonderland of space for another spacewalk to repair the orbiting outpost's critical cooling system Tuesday. This EVA (extra-vehicular activity, or spacewalk) is the second in a series of spacewalks quickly planned after a problem with the vital system arose on Dec. 11. NASA astronaut Rick Mastracchio stands on the International Space Station's robotic arm during an urgent spacewalk to fix the station's vital cooling system. Originally, NASA officials planned three spacewalks to fix the issue, however, if all goes well during the Christmas Eve EVA, the astronauts should be able to get the system back up and running at full capacity without a third spacewalk. You can watch the full 6.5-hour long spacewalk on SPACE.com via NASA TV. Live coverage starts at 6:15 a.m. EST (1115 GMT), and the Christmas Eve spacewalk should start at about 7:10 a.m. EST