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In an unusual moment of klutziness, spacewalking astronaut Heide Stefanyshyn-Piper let a tool kit slip from her grasp while she was working outside the International Space Station yesterday, and watched helplessly as it drifted away into deep space. “Oh, great,” said a dismayed Stefanyshyn-Piper, a veteran of two spacewalks in 2006, as she watched the bag float away [Florida Today].

The mishap occurred during the first of four spacewalks scheduled to be completed during the visit from the Endeavour space shuttle crew. The tool kit made its escape while Stefanyshyn-Piper and her colleague Steve Bowen were greasing a rotary joint on the station’s giant starboard solar array system. The joint has been unable to automatically point the solar wings toward the Sun for maximum energy production for over a year. Just as she was finishing up the job, the tool bag became untethered from a larger kit case and floated away along with a pair of grease guns, wipes and a putty knife. She reached out, but to no avail [BBC News].

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A redundant piece of the International Space Station’s cooling system that was chucked overboard more than a year ago finally reached the earth’s atmosphere this weekend. NASA expected the 1,400-pound piece of space junk to break apart and partially burn up in the intense heat of reentry, but warned that up to 15 pieces of the object could hit the earth’s surface. NASA exploding-space-fridge experts have worked out that the largest pieces of tank which could survive might be as big as [40 pounds] and travelling at 100 mph…. “If anybody found a piece of anything on the ground Monday morning, I would hope they wouldn’t get too close to it” [The Register], says space station manager Mike Suffredini.

Suffredini said that while astronauts have accidentally lost a tool or two during spacewalks, the planned jettison of larger items is done with the utmost care to ensure the trash doesn’t hit the station or any other spacecraft as it circles the Earth. Engineers also make sure the risk to people on Earth is low, as well. “As a matter of course, we don’t throw things overboard haphazardly,” Suffredini said. “We have a policy that has certain criteria we have to meet before you can throw something overboard” [SPACE.com].

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When the space shuttle Atlantis docks with the Hubble Space Telescope for a final repair mission in October, astronauts will face a unusually high risk of a catastrophic collision with orbital debris, NASA officials say. The amount of space junk in the environment around the Hubble adds another element of danger to the already challenging mission, which aims to keep NASA’s premier telescope in service until at least 2013.

The environment where Hubble flies, about 350 miles (560 km) above the planet, is more littered with shards of exploded spacecraft and rockets than the area around the International Space Station, which orbits about 210 miles above Earth. The odds of catastrophic damage from an orbital debris strike are 1 in 185 for the Hubble crew, compared with 1 in 300 for missions to the space station, John Shannon, the shuttle program manager, told reporters. “It’s our biggest risk,” he said [Reuters].

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