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NASA quietly posts images of explosive Antares failure
Less than a week after publishing the results of an independent investigation into last year's Antares rocket failure, NASA has released new photos of the catastrophic crash just after liftoff from Wallops Island, Virginia.

NASA marks 15 years of space station occupation
The International Space Station's first three-man crew moved in on Nov. 2, 2000, 15 years ago Monday, the first of 45 expeditions to date that have logged a decade and a half of continuous human presence in low-Earth orbit.

Two Antares failure probes produce different results
An Orbital ATK investigation into last year's Antares rocket crash in Virginia identified a decades-old manufacturing defect inside an AJ26 engine turbopump as the most likely cause of the failure, but a team of NASA engineers was not so sure in their report.

One year after Antares failure, Orbital ATK nears return to flight
A year after a launch mishap left Orbital ATK's Cygnus supply ship without a ride to the International Space Station, company officials say the cargo delivery system is on the verge of a comeback, thanks to deals with United Launch Alliance and a decision to redesign its Antares booster with new rocket engines.

Station astronauts complete tedious spacewalk
Space station commander Scott Kelly and Kjell Lindgren carried out a tedious seven-hour 16-minute spacewalk Wednesday, installing cables needed for a new docking mechanism, mounting insulation panels on a physics experiment to improve cooling and lubricating the latching mechanism of the station's robot arm.

Station astronauts gearing up for spacewalk Wednesday
Expedition 45 commander Scott Kelly and flight engineer Kjell Lindgren have switched their spacesuits to battery power to begin planned six-and-a-half-hour spacewalk Wednesday outside the International Space Station.

Bags are packed inside Cygnus commercial cargo freighter
The first installment of supplies and provisions tagged for launch on Orbital ATK's next commercial supply run to the International Space Station, the company's first since a catastrophic launch failure last year, has been loaded into the Cygnus spacecraft's pressurized cargo section.

Cygnus service module arrives in Florida for station flight
The power and propulsion section of Orbital ATK's next Cygnus supply ship, featuring new solar panel and fuel tank designs, arrived at NASA's Kennedy Space Center in Florida on Wednesday to be joined with a cargo module for a Dec. 3 launch to the International Space Station.

Sierra Nevada on watch for critical cargo award
A prototype of Sierra Nevada's Dream Chaser space plane is nearing shipment to California's Mojave Desert to resume runway landing tests as officials wait for word from NASA whether the company will win a competition to ferry cargo to the International Space Station.

Q&A with Mark Sirangelo, leader of Sierra Nevada Space Systems
Sierra Nevada Corp. has business activity across a spectrum of programs, from Orbcomm communications satellites to parts on the New Horizons mission to Pluto, but all eyes are now on the company's Dream Chaser spacecraft. Sierra Nevada's Mark Sirangelo met with reporters at the 2015 International Symposium for Personal and Commercial Spaceflight.