Orbital Sciences Corporation

A decade-old mystery has been resolved after a NASA investigation found that the loss of two science satellite missions in 2009 and 2011 was due to falsified test results on the part of a private subcontractor.

As part of NASA's CYGNSS mission, a three-stage booster fired its engines in midair before soaring into orbit with its payload of eight microsatellites designed to monitor hurricanes with a new generation of remote sensors.

Almost two years after a disastrous liftoff explosion, Orbital-ATK's Antares booster is back in service. At 7:45 pm EDT, an improved Antares 230 rocket blasted off from the MARS Pad 0A at NASA's Wallops Island facility in Virginia carrying the commercial OA-5 mission.

An unmanned Cygnus cargo ship left the International Space Station (ISS) today – and then NASA set it on fire. The controlled burn inside an insulated container is part of a study to learn more about the nature of fire in zero gravity.

The Orbital ATK CRS-6 mission is on its way to the International Space Station (ISS). The unmanned Cygnus cargo ship lifted off today at 11:05 pm EDT from Space Launch Complex 41 at Cape Canaveral Air Force Station in Florida

The Orbital Sciences/ATK Cygnus CRS-4 mission came to an end today as NASA astronauts used one of the International Space Station's robotic arms to release the spacecraft from its docking port.

Aerospace 3D printing went Mach 5 this week, with Orbital ATK announcing that it has successfully tested a printed hypersonic engine combustor at NASA's Langley Research Center in Virginia.

NASA has added Sierra Nevada Corporation's unmanned Dream Chaser to the privately owned fleets bringing cargo to the ISS from the United States. New Commercial Resupply Services (CRS-2) contracts to keep the station stocked through 2024 have also been awarded to Orbital ATK and SpaceX.

It was third time lucky today as the unmanned Orbital Sciences/ATK Cygnus CRS-4 mission lifted off from Cape Canaveral Air Force Station in Florida.

The launch of the Orbital Sciences/ATK Cygnus CRS-4 mission to the International Space Station (ISS) has been aborted for a second time due to high ground winds.

Thursday's launch of Orbital Sciences' Cygnus spacecraft to the International Space Station (ISS) has been scrubbed due to poor weather at Cape Canaveral.

At a press conference arranged only a few hours after the event, NASA released details of the explosion of the Antares rocket carrying the unmanned Cygnus supply ship to the International Space Station (ISS).