Cygnus cargo logistics spacecraft approaching the ISS.
An Orbital Sciences Corp. Antares rocket is seen partially assembled ahead of 2013 test flight.
The commercial spaceflight company Orbital Sciences Corp. successfully tests the first stage engines of its Antares rocket during a hot fire test at the Mid-Atlantic Regional Spaceport on Wallops Island, Va., on Feb. 22, 2013.
This graphic shows Orbital Sciences' Cygnus spacecraft and Taurus 2 rocket, and compares them to NASA's space shuttles and SpaceX's Falcon 9 rocket.
The first stage of the Antares rocket stands on the pad at NASA's Wallops Flight Facility ahead of its February 2013 engine test-firing.
Artist's concept of Orbital Sciences' Antares rocket, formerly known as the Taurus 2.
Orbital Sciences Corp.’s Antares rocket rolls out to the launch pad at NASA’s Wallops Flight Facility on the morning of Oct. 1, 2012. Over the next several months, Orbital plans a hot-fire test of the Antares first stage, the rocket's maiden flight, and a demonstration cargo mission to the International Space Station.
The first stage of Orbital Sciences' Antares rocket arrives at the pad at NASA's Wallops Flight Facility in Virginia on Oct. 1, 2012.
The Antares rocket first stage left the Horizontal Integration Facility (HIF), beginning its one-mile trip to the launch pad aboard the specially designed Transporter/Erector/Launcher (TEL) at Wallops Island Launch Facility.
The Antares rocket first stage ascends the ramp leading to the pad at Wallops Island.
An artist's illustration of an Orbital Sciences Antares rocket launching from Wallops Flight Facility in Wallops Island, Va.
Artist's rendering of Cygnus spacecraft.
Two Cygnus service modules being constructed in Orbital's Dulles, VA Satellite Manufacturing Facility.
Orbital Sciences Corp.'s first Cygnus cargo carrier pressurized module arrives at NASA's Wallops Flight Facility on Aug. 23, 2011 ahead of preparations for a Feb. 2012 test flight to the International Space Station.
The first stage of Orbital Sciences' first Taurus 2 rocket is shown in the new Horizontal Integration Facility at NASA's Wallops Flight Facility in Wallops Island, Va.
Artists' rendering of Antares in flight.
The AJ26 engine fired in Mississippi for about 54 seconds on Wednesday.
Artist rendering of Cygnus spacecraft approaching the International Space Station.
Artist's rendering of Cygnus spacecraft approaching the International Space Station.
Orbital Sciences Corporation announced on Dec. 12, 2011 that Antares™ will be the permanent operational name for the medium-class launch vehicle created by its research and development program formerly known as Taurus II. This artist's impression shows the rocket lifting off.
An Orbital Sciences Corporation Taurus XL rocket carrying NASA’s Glory spacecraft launched from Space Launch Complex 576-E here at 2:09 a.m. (PST) March 4, 2011.
The Glory satellite's Taurus XL rocket stands on Space Launch Complex 576-E at Vandenberg Air Force Base in California.
NASA’s Orbiting Carbon Observatory and its Taurus XL booster lift off from Vandenberg Air Force Base on Feb. 24, 2009. A contingency was declared a few minutes later.