Gallery: Antares rocket explodes

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 Thursday at 5:55 p.m. EST (2255 GMT).

Northrop Grumman’s Antares rocket will deliver a Cygnus supply ship into orbit Saturday to begin a two-day pursuit of the International Space Station.

Orbital Sciences Corp. plans to select a long-term propulsion supplier for the Antares rocket used to launch cargo to the International Space Station in the next few weeks, in time to include a potentially redesigned launcher in a bid for a follow-on NASA resupply contract.