Realtime coverage of Russian EVA-37 (UrtheCast camera installation; experiments) Read More...

Realtime coverage of U.S. EVA-25 (loop A ammonia pump module replacement). Read More...

Astronauts Rick Mastracchio and Mike Hopkins prepared their spacesuits Monday for a Christmas Eve spacewalk, their second in four days to complete an urgent cooling system repair job aboard the International Space Station's main power truss.
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Realtime coverage of U.S. EVA-24 (loop A ammonia pump module removal). Read More...

Engineers are confident the spacesuits that will be used for two and possibly three excursions to repair the space station's coolant system are in good shape and that no problems with water leakage are expected. Read More...

After an exhaustive effort to come up with a fix for a balky valve in a space station coolant loop, NASA managers decided Tuesday to resolve the problem with two and possibly three spacewalks to replace a refrigerator-size ammonia pump module. Read More...

A Chinese spacecraft, carrying a suite of instruments and a small rover named Yutu, or "Jade Rabbit," settled to an on-target touchdown on the moon Saturday, the first such lunar landing in 37 years and a major achievement for the Chinese space program. Read More...

NASA managers decided to delay launch of an Orbital Sciences Corp. space station cargo ship by at least one day amid ongoing work to come up with a fix for a balky valve in a cooling system that has forced the station crew to power down non-critical systems.
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Engineers are running tests to figure out what is affecting the operation of a critical valve inside a coolant pump aboard the International Space Station that has forced flight controllers to shut down non-essential systems, curtailing science operations. Read More...

A valve in a coolant system pump module aboard the International Space Station apparently malfunctioned Wednesday, triggering cooling problems in one external ammonia loop and prompting flight controllers to power down non-essential equipment. Read More...

Studying an ancient lakebed on Mars, NASA's Curiosity rover team is now looking for areas where erosion may have uncovered pristine layers in which organic compounds -- and possibly remnant traces of life -- might still be found, scientists said Monday.
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A United Launch Alliance Atlas 5 rocket roared to life and climbed away from its California launch pad overnight Thursday, kicking off a classified mission to boost a National Reconnaissance Office spy satellite into orbit.
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During the final hours of its one and only trip into the inner solar system, Comet ISON almost certainly disintegrated in the hellish glare and crushing grip of the sun, leaving a cloud of debris -- and a treasure trove of data -- in its wake. Read More...

SpaceX sucessfully launched an upgraded Falcon 9 rocket carrying an SES communications satellite Tuesday, the opening salvo in a closely watched bid to win a share of the commercial launch market with low-cost assembly-line boosters.
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Launch of a SpaceX Falcon 9 rocket carrying a commercial communications satellite is now targeted for Tuesday evening, company officials said Monday, giving engineers more time to review data in the wake of a Thanksgiving Day launch abort .
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A powerful Long March 3B rocket boosted China's first lunar lander into space Sunday, an unmanned mothership that will descend to the surface in mid December and deploy a rover named Yutu, or "Jade Rabbit," for independent scientific observations. Read More...