Virgin Galactic's futuristic SpaceShipTwo rocket plane, built to carry adventurous tourists on sub-orbital spaceflights, suffered a catastrophic failure Friday during a rocket-powered test flight high above the Mojave Desert, killing one pilot and injuring another.
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A day after an explosion that destroyed an Orbital Sciences Antares rocket carrying a space station cargo ship, company officials said Wednesday they hope to zero in on the likely cause of the mishap within a week or so. Read More...

A United Launch Alliance Atlas 5 rocket blasted off from Cape Canaveral Wednesday and boosted a $245 million Air Force navigation satellite into space, a welcome development after another rocket, also powered by Russian first-stage engines, exploded Tuesday. Read More...

Nine hours after a spectacular launch failure that destroyed a U.S. supply ship bound for the International Space Station, a Russian Progress cargo ship blasted off from Kazakhstan and successfully docked with the lab complex six hours later Read More...

An Orbital Sciences Antares rocket exploded seconds after launch from the Virginia coast Tuesday, erupting in a spectacular fireball and destroying an uncrewed Cygnus cargo ship in a disheartening failure for NASA's commercial space station resupply program.
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Two cosmonauts ventured outside the International Space Station Wednesday, jettisoning three no-longer-needed components and carrying out a photo survey of the Russian segment of the lab complex in the year's seventh and final ISS spacewalk. Read More...

The red planet's brush with Comet Siding Spring Sunday was a close encounter of the best kind for science, a once-in-a-lifetime chance to study a pristine remnant of the solar system's birth 4.6 billion years ago. Read More...

An unpiloted Air Force spaceplane glided back to Earth Friday after a record stay in orbit, closing out a clandestine military mission with a computer-controlled landing at Vandenberg Air Force Base, Calif.
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Astronauts Reid Wiseman and Barry "Butch" Wilmore floated outside the International Space Station Wednesday and, after a bit of trouble with a balky bolt, replaced a broken voltage regulator to restore the lab's electrical grid to normal operation.
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Rescinding a work stoppage in the wake of a bid protest by losing competitor Sierra Nevada, NASA has told Boeing and SpaceX to resume work on commercial crew spacecraft to avoid possible delays ferrying astronauts to and from the space station. Read More...

An international fleet of five Mars orbiters and two rovers will have ringside seats when a mountain-size comet streaks by on Oct. 19, passing within a scant 87,000 miles of the red planet at a blistering 126,000 mph, NASA scientists said Thursday.
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Boeing is modifying the Kennedy Space Center's remaining two orbiter processing facilities to service the secret X-37B spaceplane for the Air Force, NASA announced Wednesday.
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A NASA space telescope studying X-ray emissions from a nearby galaxy has discovered the brightest pulsar ever detected, the fast-spinning remnant of a collapsed star that shines so intensely it was initially mistaken for a massive black hole.
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Astronauts Reid Wiseman and Alexander Gerst carried out a smooth six-hour 13-minute spacewalk Tuesday, moving a pump module to long-term storage and installing backup power gear for the space station's robot arm transporter. Read More...

Two U.S. spacewalks this week and next will the stage for a complex series of eight to 10 NASA EVAs and module relocations next year that are needed to prepare the station for dockings by Boeing and SpaceX commercial crew ferry craft.
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