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Astronauts Hunt for Space Station Ammonia Leak (Spacewalk Photos)

Ammonia Pump Control Box: Detailed View

NASA

This NASA graphic provides a detailed look at the ammonia pump control box to be inspected and possibly replaced during an emergency spacewalk on May 11, 2013.

ISS Ammonia Pump Flow Control Subassembly

NASA

This NASA images shows the type of liquid ammonia pump control box to be inspected during an emergency spacewalk outside the International Space Station on May 11, 2013.

Ammonia Pump Flow Control Subassembly (Back View)

NASA

A rear view of the type of liquid ammonia pump control box to be inspected during an emergency spacewalk outside the International Space Station on May 11, 2013.

Space Station P6 Coolant Loop Explained

NASA

This NASA graphic explains the components of the solar array cooling system on the International Space Station's Port 6 truss.

Astronauts Evaluate Ammonia Spacewalk Procedures

NASA

On May 10, 2013, NASA astronaut Terry Virts simulates extravehicular activity in the Johnson Space Center's Neutral Buoyancy Laboratory. His session, in which he was joined by European Space Agency astronaut Samantha Cristoforetti (background), was to evaluate proper procedures and techniques in support of a possible weekend space walk by two astronauts on the International Space Station to trouble-shoot an ammonia leak issue, discovered earlier in the week. A number of SCUBA-equipped divers were in the water to assist the astronauts.

Space Station Solar Array Cooling System

NASA

This NASA graphic shows the locations of hardware on the International Space Station's Port 6 Truss, where the cooling system for the 2B solar array panels, and the solar array itself, are located.

Astronauts Evaluate Ammonia Spacewalk Procedures

NASA

On May 10, 2013, NASA astronaut Terry Virts simulates extravehicular activity in the Johnson Space Center's Neutral Buoyancy Laboratory. His session, in which he was joined by European Space Agency astronaut Samantha Cristoforetti (out of frame), was to evaluate proper procedures and techniques in support of a possible weekend space walk by two astronauts on the International Space Station to trouble-shoot an ammonia leak issue, discovered earlier in the week. A number of SCUBA-equipped divers were in the water to assist the astronauts.

Astronauts Submerging in Waters of Neutral Buoyancy Laboratory

NASA

On May 10, 2013, European Space Agency astronaut Samantha Cristoforetti, in a ground version of the NASA extravehicular mobility unit space suit, is about to go under the water in the Johnson Space Center's Neutral Buoyancy Laboratory. Her session, in which she was joined by NASA astronaut Terry Virts (out of frame), was to evaluate proper procedures and techniques in support of a possible weekend space walk by two astronauts on the International Space Station to trouble-shoot an ammonia leak issue, discovered earlier in the week. A SCUBA-equipped diver is in the water to assist the astronauts.

Astronauts Evaluate Ammonia Spacewalk Procedures

NASA

On May 10, 2013, NASA astronaut Terry Virts simulates extravehicular activity in the Johnson Space Center's Neutral Buoyancy Laboratory. His session, in which he was joined by European Space Agency astronaut Samantha Cristoforetti (out of frame), was to evaluate proper procedures and techniques in support of a possible weekend space walk by two astronauts on the International Space Station to trouble-shoot an ammonia leak issue, discovered earlier in the week. A number of SCUBA-equipped divers were in the water to assist the astronauts.

Astronauts Submerging in Waters of Neutral Buoyancy Laboratory

NASA

On May 10, 2013, European Space Agency astronaut Samantha Cristoforetti prepares to be submerged in the waters of the Johnson Space Center's Neutral Buoyancy Laboratory. Her session, in which she was joined by NASA astronaut Terry Virts (partially visible behind Cristoforetti), was to evaluate proper procedures and techniques in support of a possible weekend space walk by two astronauts on the International Space Station to trouble-shoot an ammonia leak issue, discovered earlier in the week. A SCUBA-equipped diver is in the water to assist the astronauts.

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