Gallery: Antares rocket explodes

An Antares booster emerged from its hangar on Virginia’s Eastern Shore and rolled out to its launch pad Thursday for the first time since a rocket failure grounded Orbital ATK’s cargo launcher in 2014.

An unpiloted space plane developed by Sierra Nevada Corp. will join cargo carriers built by SpaceX and Orbital ATK to resupply the International Space Station beginning in 2019, NASA announced Thursday.

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.