After three catastrophic in-flight failures in a row, SpaceX readied a huge Super Heavy-Starship rocket for launch Sunday evening from the Texas Gulf Coast to put a variety of upgrades to the test and to deliberately stress the vehicle to learn more about its capabilities.

SpaceX hoped to launch its Starship Flight 10 test mission on Sunday (Aug. 24) at 7:30 p.m. EDT (2330 GMT), but is now targeting Aug. 25.

SpaceX has scrubbed an attempt to launch its 10th test flight of the Starship megarocket due to “an issue with ground systems.” The rocket system has experienced a string of explosive missteps this year.