Future manned missions to Mars will require internal shielding and advanced propulsion systems to shorten transit times, minimizing exposure to caner-causing space radiation, scientists said Thursday. Read More...

Four years after a final shuttle servicing mission, the Hubble Space Telescope is operating like a fine watch, with no major technical problems that would prevent it from operating through the end of the decade.
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Despite steady advances in ground-based astronomy, the Hubble Space Telescope remains an icon of world-class science, more productive today than at any point in its history, scientists say. Read More...

A Soyuz rocket blasted off Tuesday and thundered into orbit carrying a veteran cosmonaut, a NASA shuttle veteran and a rookie Italian test pilot on a fast-track flight to the International Space Station. Read More...

Engineers prepped a Soyuz spacecraft for launch Tuesday to ferry three crew members -- a veteran Russian cosmonaut, an Italian test pilot and an American shuttle veteran -- to the International Space Station. Read More...

A United Launch Alliance Delta 4 rocket vaulted away from Cape Canaveral Friday and lofted a $342 million military communications satellite into orbit after a picture-perfect climb to space.
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A United Launch Alliance Atlas 5 rocket boosted a new Global Positioning System satellite into space Wednesday, the latest in a series of upgraded navigation beacons with improved accuracy and longevity.
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NASA's $600 million Kepler Space Telescope, a leading player in the hunt for Earth-like planets orbiting sun-like stars, has been sidelined by problems with stabilizing gyroscopic reaction wheels. Read More...

A Soyuz spacecraft carrying three outgoing space station crew members undocked Monday, on track for landing in Kazakhstan to close out a 146-day mission. Read More...

Astronauts Thomas Marshburn and Christopher Cassidy carried out a five-hour 30-minute spacewalk Saturday to remove and replace a suspect coolant pump assembly on the space station's power truss. Read More...

NASA managers are hopeful the replacement of a pump module during an impromptu spacewalk Saturday will eliminate an ammonia coolant leak aboard the International Space Station, officials said Friday.
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Pending final approval, space station astronauts are gearing up for an unscheduled spacewalk Saturday to look for the source of an ammonia coolant leak on the far left end of the lab's solar power truss. Read More...