Watch the Falcon 9 launch from pad 39A

SpaceX said Tuesday it won’t perform a final countdown dress rehearsal this week for the giant new Starship launch vehicle, and could send the rocket — standing nearly 40 stories tall on its Texas launch pad — on an around-the-world test flight as soon as next week.

SpaceX launched Argentina’s SAOCOM 1B radar observation satellite from Cape Canaveral at 7:18 p.m. EDT (2318 GMT) Sunday. A Falcon 9 rocket headed toward the south on a trajectory hugging the Florida East Coast on the first flight into polar orbit from Cape Canaveral since 1969, and the first stage booster returned to the spaceport for an onshore landing minutes after liftoff.

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.