Gallery: Antares rocket explodes

Orbital ATK’s upgraded Antares rocket, featuring newly-built RD-181 main engines, completed a 30-second test firing on a launch pad on Virginia’s Eastern Shore on Tuesday.

Stormy weather near NASA’s Kennedy Space Center kept SpaceX’s Falcon 9 rocket on the ground Thursday, delaying liftoff of a commercial supply ship with equipment and experiments for the International Space Station until Saturday.

Follow the Atlas 5 rocket’s ascent into orbit from Cape Canaveral’s Complex 41 launch pad with the Orbital ATK Cygnus resupply ship for the International Space Station. Launch is scheduled for Tuesday at 11:05 p.m. EDT (0305 GMT).