From StarTalk Plus.

Neil deGrasse Tyson and Chuck Nice analyze the science behind time travel in Back to the Future, responding to a fan’s question about cosmic reference frames and motion through space. Tyson explains that real time travel would require moving through both space and time simultaneously, while also highlighting overlooked details in the film that cleverly account for location consistency and subtle timeline changes.

From ‘Incoming Asteroids, Moving Black Holes, & More! | Cosmic Queries #104’": https://youtu.be/ZgwqxKnJoEM?si=pDjhpYw3_YAUH8jI

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