Early Tuesday at NASA's Kennedy Space Center in Florida, four private astronauts, led by billionaire Jared Isaacman, embarked on a landmark space mission aboard SpaceX's Crew Dragon capsule. This mission, dubbed Polaris Dawn, is set to reach an unprecedented altitude of 870 miles above Earth—the highest since the Apollo moon missions.

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First commercial spacewalk set as SpaceX’s Polaris reaches new heights

12 hrs ago 1:43

Private astronauts on SpaceX's Polaris Dawn aim for a record 870-mile orbit, the highest since the last Apollo mission.

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