yesterday, we announced that the Antares is already on the launch Pad-0A at +NASA's Wallops Flight Facility. This morning, the Antares launch team decided to delay the space launch due to an unusually high level of space radiation that exceeded by a considerable margin the constraints imposed on the mission to ensure the rocket's electronic systems are not impacted by a harsh radiation environment.
Image source : Orbital Science
The space rocket is in advance of a planned launch on January 8th at 1:32 p.m. EST on the Wallops Island, VA. The Orbital-1 mission is Orbital Sciences' first contracted cargo delivery flight to the space station for NASA. Among the cargo aboard Cygnus set to launch to the international space station are science experiments, crew provisions, and other hardware.
[Update] : if the level of radiations moves down, Orbital Sciences announces that the launch could be performed on Thursday, the launch targeted launch time would be 1:10 p.m. (EST), with Cygnus arriving at the ISS Sunday morning, January 12.