SpaceX's Starship is about to face its 10th test flight following explosions on previous launches. SpaceX CEO Elon Musk has promised that the world's most powerful rocket and spacecraft will one day take humans to Mars and beyond. But leading up to its 10th launch, scheduled for Sunday at 7:30 p.m. ET, Starship has yet to achieve all its mission goals. And the last three flight tests, plus a static engine test in June, ended in explosions. "We now have serious questions whether the architecture of Starship is in fact feasible or not," said Olivier de Weck, the Apollo Program professor of Astronautics and Engineering Systems at MIT and editor-in-chief of the Journal of Spacecraft and Rockets. "I'm much, much less concerned about the Super Heavy booster. But the upper stage, the Starship its

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