Astronauts practice countdown for moon trip.

Four astronauts in training for a moon flyby next year completed a dress rehearsal countdown in their Orion spacecraft, facing delays but overall success. The test, occurring inside NASA’s Vehicle Assembly Building, simulated launch day procedures for the upcoming mission tentatively set for early February. The crew will spend 25 hours in Earth orbit before heading around the moon and back in a historic journey, paving the way for future lunar missions.

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