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In the twin paradox example done in lecture, just after Alice leaves the star on her return trip (and she’s back up to her cruising speed of 0.6c), she observes Bob’s clock back where he is located. (In other words, she has a photo taken of his clock and her corresponding clock at that location, her clock being part of her lattice of clocks.) Compared to her clock, does she observe Bob’s clock to be behind, ahead, or the same time as hers?

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