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AU Mic is a young, nearby star with two Neptune-sized planets and a debris disk. Researchers observed back-to-back transits of both planets, AU Mic b and c, using multiple telescopes and measured their spin-orbit alignment with the Rossiter-McLaughlin effect. They confirmed that planet b’s orbit is well aligned with the star’s rotation, while planet c’s orbit is likely aligned but a polar orbit cannot be ruled out due to data limitations. The study found that stellar activity, especially duri...