Daily Archives: May 12, 2013

Space Station Live: May 9, 2013
The Space Station Live recap video for May 9, 2013. Watch the full Space Station Live broadcast weekdays on NASA TV at 10 a.m. CDT. http://www.nasa.gov/ntv.

By: ReelNASA

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Space Station Live: May 9, 2013 - Video

Alien Creature Swims Past International Space Station 2013 1080p

By: kerem umay

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Alien Creature Swims Past International Space Station 2013 1080p - Video

Spacewalks Needed To Repair Space Station Cooling System In 2010 | Video
Three spacewalks were conducted by Expedition 24 Flight Engineers Doug Wheelock and Tracy Caldwell Dyson to remove and replace a failed ammonia pump that disabled one of the station #39;s 2 cooling...

By: VideoFromSpace

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Spacewalks Needed To Repair Space Station Cooling System In 2010 | Video - Video

NASA monitoring leak on International Space Station
NASA is monitoring a leak on the International Space Station from a large radiator that prevents electrical systems from overheating. Norah O #39;Donnell reports.

By: CBSNewsOnline

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NASA monitoring leak on International Space Station - Video

Space Station Live: May 10, 2013
The Space Station Live recap video for May 10, 2013. Watch the full Space Station Live broadcast weekdays on NASA TV at 10 a.m. CDT. http://www.nasa.gov/ntv.

By: ReelNASA

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Space Station Live: May 10, 2013 - Video

International Space Station Ammonia Leak Prompts Spacewalk Preps / NASA / ISS
Aboard the International Space Station a leak of ammonia coolant was detected on May 9, coming from a location on the station #39;s P6 truss. Credit: NASA SPACE ...

By: ThunderAerospace

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International Space Station Ammonia Leak Prompts Spacewalk Preps / NASA / ISS - Video

Space Station Ammonia Leak Seen By Exterior Camera | Video
Droplets of liquid are seen floating out the the International Space Station on May 10th, 2013. The leak is emanating from the station #39;s P6 truss.

By: VideoFromSpace

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Space Station Ammonia Leak Seen By Exterior Camera | Video - Video

Astronaut helmet camera captures video of NASA engineers Chris Cassidy and Tom Marshburn replacing a pump on International Space Station suspected of leaking ammonia.

By Tariq Malik, Space.com

Two spacewalking astronauts may have fixed an ammonia leak outside the International Space Station on Saturday, perhaps bringing the outpost's vital cooling system back up to full strength.

Clad in bulky spacesuits, NASA astronauts Chris Cassidy and Tom Marshburn replaced a pump control box thought to be responsible for theleak of ammonia, which cools down the orbiting lab's systems. It looks like this fix did the trick, as no ammonia flakes were seen streaming into space when Mission Control turned on the newly installed gear.

"We're not seeing anything," Cassidy said at around 12:35 p.m. ET, several minutes after the pump was turned on. "No snow." [Emergency Spacewalk to Fix Space Station Leak in Photos]

NASA officials stopped short of declaring total victory, however, saying that time will tell if the fix holds.

"It will take some diagnostics, still, over the course of the next several days by the thermal systems specialists to fully determine that we have solved the problem of theammonia leak,"NASA spokesperson Rob Naviassaid during live mission commentary. "But so far, so good."

An emergency spacewalk Cassidy and Marshburn floated outside the space station at 8:44 a.m. ET Saturday, beginning what officials described as a six-hour detective's investigation to find and hopefully fix the ammonia leak.

Cassidy, who led the spacewalk, reported seeing "no smoking gun" as he and Marshburn began their inspection of the old ammonia pump control box, one of several on the space station's far left segment, known as the Port 6 truss. It is part of the cooling system for the two wing-like solar arrays extending from the Port 6 segment.

Upon removing the box, the spacewalkers still saw no signs of ammonia flakes.

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Spacewalkers fix space station's coolant leak

Two spacewalking astronauts may have fixed an ammonia leak outside the International Space Station today (May 11), perhaps bringing the outpost's vital cooling system back up to full strength.

Clad in bulky spacesuits, NASA astronauts Chris Cassidy and Tom Marshburn replaced a pump control box thought to be responsible for the leak of ammonia, which cools down the orbiting lab's systems. It looks like this fix did the trick, as no ammonia flakes were seen streaming into space when Mission Control turned on the newly installed gear.

"We're not seeing anything," Cassidy said at around 12:35 p.m. EDT (1635 GMT), several minutes after the pump was turned on. "No snow." [Emergency Spacewalk to Fix Space Station Leak in Photos]

NASA officials stopped short of declaring total victory, however, saying that time will tell if the fix holds.

"It will take some diagnostics, still, over the course of the next several days by the thermal systems specialists to fully determine that we have solved the problem of theammonia leak,"NASA spokesperson Rob Naviassaid during live mission commentary. "But so far, so good."

An emergency spacewalk

Cassidy and Marshburn floated outside the space station at 8:44 a.m. EDT (1244 GMT) today, beginning what officials described as a six-hour detective's investigation to find and hopefully fix the ammonia leak.

Cassidy, who led the spacewalk, reported seeing "no smoking gun" as he and Marshburn began their inspection of the old ammonia pump control box, one of several on the space station's far left segment, known as the Port 6 truss. It is part of the cooling system for the two wing-like solar arrays extending from the Port 6 segment.

Upon removing the box, the spacewalkers still saw no signs of ammonia flakes.

"It looks really, really clean, surprisingly so," Cassidy said while peering deep inside the box using what looked like a dentist's mirror.

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Spacewalking Astronauts Hopeful New Pump Fixes Space Station Leak

By Irene Klotz

CAPE CANAVERAL, Florida (Reuters) - A pair of spacewalking astronauts wrapped up a hastily planned repair job on Saturday to replace a suspect coolant pump needed to keep the International Space Station at full power.

NASA astronauts Chris Cassidy and Tom Marshburn put on spacesuits and left the space station's airlock shortly before 9 a.m. EDT to attempt to stem an ammonia coolant leak that cropped up on Thursday.

Over the next four hours, they installed a spare pump, then positioned themselves to check for signs of escaping ammonia ice crystals when the system was turned back on.

"No flakes," Cassidy reported to flight controllers at the Johnson Space Center in Houston.

Engineers will monitor the system over the next several days and beyond to make sure the pump replacement fixed the problem.

"We certainly have come a long way in identifying a potential source," said NASA mission commentator Rob Navias as the astronauts returned to the station's airlock. The entire spacewalk lasted 5-1/2 hours.

The station crew discovered a steady stream of ammonia flakes flowing away from the far left side of the station's exterior frame on Thursday. Flight controllers spent the next 48 hours diagnosing the problem and coming up with potential solutions.

Engineers believed the leak most likely was coming from in or around a 260-pound (118-kg) pump that pushes ammonia throughout the system. The coolant dissipates heat from electronics in space station's solar-powered electrical system.

The station can be reconfigured to compensate for a system shutdown, but if a second problem should occur, that likely would mean a cutback in power available for the experiments.

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Spacewalking repairmen replace space station's leaky pump