Live coverage: SpaceX launches another batch of Starlink satellites

Virgin Galactic’s SpaceShipTwo rocket plane, built to eventually carry commercial passengers to the edge of space, accomplished another powered test flight into the rarefied upper atmosphere Thursday with two pilots on-board.

SpaceX engineers have narrowed the cause of last week’s unsuccessful landing of a Falcon 9 rocket booster on a barge in the Atlantic Ocean on a commanding issue with an engine throttle valve, according to Elon Musk, the company’s founder and chief executive.

Isolated camera angle replays of Saturday morning’s predawn SpaceX Falcon 9 launch of the Dragon capsule to the International Space Station.