Live coverage: SpaceX Falcon Heavy launches NASA’s Psyche on mission to a metal asteroid

A SpaceX Dragon supply ship packed with nearly three tons of experiments, crew provisions and supplies will remain on the ground until at least Friday morning to allow more time for NASA flight controllers to troubleshoot a problem with an electrical distribution unit on the International Space Station.

Engineers from SpaceX, Boeing and Inmarsat spent the last few weeks preparing a Falcon 9 rocket and the Inmarsat 5 F4 communications satellite for liftoff from NASA’s Kennedy Space Center in Florida.

SpaceX’s first Falcon 9 Block 5 rocket, sporting changes to make the booster easier to reuse, rolled out of its hangar and up the ramp to launch pad 39A at NASA’s Kennedy Space Center on Thursday ahead of a planned hold-down engine firing.