Live coverage: Falcon 9 disintegrates after launch

NASA expects to select commercial contractors to resupply the International Space Station in September, three months later than the agency’s previous timetable under a competition for cargo deliveries beginning in 2018.

A commercial Northrop Grumman Cygnus supply ship berthed at the International Space Station fired its main engine for 50 seconds Tuesday in a test of the spacecraft’s ability to reboost, and possibly eventually deorbit, the massive research outpost.

SpaceX has launched its fourth Falcon 9 rocket from Florida’s Space Coast in less than 16 days. A Falcon 9 rocket blasted off with 60 more Starlink internet satellites at 2:42 a.m. EDT (0642 GMT) Sunday. The reusable booster, making its 10th flight, landed on a drone ship parked in the Atlantic Ocean.