Gallery: Antares rocket explodes

Orbital ATK transferred an Antares rocket and Cygnus supply ship to their launch pad on Virginia’s Eastern Shore late Thursday for a liftoff now targeted for Monday with nearly 7,400 pounds of cargo heading for the International Space Station.

Watch the pre-launch news conference held Monday, April 17 at NASA’s Kennedy Space Center to preview liftoff of the Orbital ATK commercial Cygnus OA-7 cargo ship aboard a United Launch Alliance Atlas 5 rocket for the International Space Station.

Based upon an on-time launch Thursday, this is the timeline for Cygnus from liftoff through capture by the space station’s robotic arm.