https://cdnph.upi.com/ph/st/th/7331784225801/2026/upi/694411a620d438ce2ff65ac08bb08cc5/v1.5/SpaceX-set-to-send-massive-Starship-rocket-on-its-13th-test-flight.jpg" /> SpaceX on Thursday was preparing to launch the 13th test of its massive Starship rocket in a liftoff from the company's South Texas Starbase.