Live coverage: Falcon 9 rocket conducts static fire test

After launching Nov. 23 and arriving in lunar orbit over the weekend, China’s Chang’e 5 sample return mission landed on the moon Tuesday, targeting a volcanic region in the Oceanus Procellarum region. On Thursday, the craft’s ascender vehicle took off to begin the trip back to Earth, followed by a successful docking with the mission’s return vehicle in lunar orbit Saturday.

SpaceX has filed a protest challenging a nearly $150 million NASA contract awarded to United Launch Alliance last month to send a robotic asteroid probe into space.

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.