Photos: Atlas 5 rocket aims for International Space Station

Closing out an automated 18-hour rendezvous, a SpaceX Dragon cargo ship loaded with 7,000 pounds of supplies and equipment, including two add-on roll-out solar blankets, caught up with the International Space Station early Tuesday and moved in for a problem-free docking.

Stratolaunch Systems, a company backed by Microsoft co-founder Paul Allen, will launch Pegasus XL rockets produced by Orbital ATK from the world’s largest airplane as officials shift focus toward deploying lighter satellites into orbit.

Ground teams at the Kennedy Space Center were packing last-minute cargo into a commercial Dragon supply ship Sunday, a day before the automated freighter is set for liftoff on top of a SpaceX Falcon 9 rocket on a two-day trek to the International Space Station.