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Spaceship leaving Earth for interstellar deep space travel

Interstellar Travel: The Four Top Technologies for Getting There

Astrophysicist Adam Frank looks at the technologies we meet in science fiction and identifies the challenges that hold them back

University of Rochester astrophysicist Adam Frank looks at the possibilities of interstellar travel, given the “insane scale” of the distances between stars and galaxies, in relation to space exploration, whether by ourselves or by intelligent extraterrestrials. Science fiction usually starts with the assumption that the distance problem is somehow already solved. What real-world proposals are out there now for solving it? At Big Think, Frank offers four: Cryosleep, solar sails (or light sails), wormholes, and warp drives. Cautioning that they may all be pipe dreams, he offers some thoughts. Possibly the most intriguing is cryosleep: Cryosleep technology would basically “freeze” the body’s metabolism (or at least slow it down) for the duration of the journey. Despite being a staple of…