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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…

The Andromeda Galaxy

Veteran Science Writer Says We Won’t Meet Intelligent Aliens

Not because they are not there but because vast interstellar distances make them unreachable

“It does not matter if intelligent life exists elsewhere. We will never find each other,” says veteran science writer Alex Berezow. He’s not saying they are not out there. He is throwing cold water on our chances of contacting them. Some things, he admits, have changed: Thanks to advances in astrophysics, we now know that there are billions of exoplanets in the Milky Way alone, leading most of the scientific community to conclude that life probably does exist elsewhere in the universe. Those who do not believe so are now considered the kooks. And while alien abductions are still not in the mainstream, UFOs are — so much so that the U.S. intelligence community just issued a report on them. Alex Berezow, “We are…