SpaceX prepares for Starship launch amidst technical challenges.

SpaceX is preparing for the inaugural test flight of Starship, the most powerful rocket ever created, which could one day return astronauts to the moon or propel the first trip to Mars. The rocket could lift off as soon as Thursday, during an hour-long launch window that opens at 8:28 a.m. CT (9:28 a.m. ET). The first launch attempt on Monday was halted after a problem with a valve created pressurization issues. The vehicle consists of two parts: The Super Heavy rocket booster and the Starship spacecraft. SpaceX CEO Elon Musk has sought to temper expectations for this test launch, saying, “success is not what should be expected …That would be insane.”