The fourth and most recent attempt at a full launch rehearsal of NASAs Space Launch System went reasonably well, and despite some lingering issues and uncertainties, the agency is sending the rocket back to the hangar for final preparations in advance of its first flight. That inaugural launch will represent Artemis 1, the first mission in NASAs Artemis lunar program. In a today, NASA—to my surprise—said it is done testing SLS after reviewing data from the recent launch rehearsal. That another...

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