Astronauts venture out for spacewalk

CAPE CANAVERAL, Fla. (AP) - Astronauts ventured back outside the international space station to perform more repair work on a jammed joint Thursday and promised to keep a tight grip on all their tools so nothing would get away this time.

A $100,000 tool bag was lost during the first spacewalk of the shuttle-station mission two days ago.

Before floating out, Heidemarie Stefanyshyn-Piper and Shane Kimbrough double- and triple-checked their equipment to make certain everything was tied down.

Stefanyshyn-Piper's tool bag slipped away Tuesday after one of the grease guns inside exploded and got bits of the dark gray stuff everywhere. She later owned up to making a mistake by not checking to make sure the bag was secured.

With two grease guns lost in space, only two remained for all the repair work, each with a different type of nozzle to reach different parts of the clogged solar wing-rotating joint. That meant Stefanyshyn-Piper and Kimbrough had to share the remaining grease guns and other tools.

NASA hoped that would not slow the spacewalkers down too much. Eager to get started, they hustled out almost an hour early Thursday afternoon.

The spacewalk - the second of four planned for shuttle Endeavour's visit - fell on the 10th anniversary of the launch of the first space station piece.

Before the action got under way outside, wishes of "Happy Birthday!" and "Happy Anniversary!" flew back and forth between flight controllers around the world and the space station's skipper, Mike Fincke.

The spacewalkers' primary job 220 miles up was to clean and lubricate the massive joint that controls the solar wings on the right side of the space station, and to replace its bearings.

It's been used sparingly since September 2007, hampering energy production at the space station. A lack of lubrication caused parts inside the joint to grind together, producing metal shavings that gummed up everything.

Other chores on the spacewalkers' to-do list: moving a pair of rail carts to clear a path for construction work planned on the next shuttle flight in February, and lubricating the bearings for the snares on the end of the space station's robot arm.

Meanwhile, much cleaner and less grueling home improvements continued inside the space station. Over the weekend, Endeavour delivered an extra bathroom and kitchen, two more bedrooms and a recycling system for turning urine and sweat into drinking water. The first sip won't happen until next spring; NASA wants to return samples aboard Endeavour and the next visiting shuttle, to make sure the recycled water is safe.

The additions will allow NASA to double the size of the space station crew, from three to six, hopefully by June.

The space station is also now home, for the next few months anyway, to two orb-weaving spiders that flew up on Endeavour. It's an experiment by Florida, Texas and Colorado schoolchildren to compare webs created in weightlessness to those on Earth. Video beamed down showed the spiders keeping busy, creating at least one real web each.

"That's our only access to the World Wide Web aboard the space station at this time," noted Fincke.

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On the Net: NASA: http://spaceflight.nasa.gov