Breakthrough Starshot tagged posts

First steps taken toward developing Interstellar lightsails

An artist's rendering showing a gray or silver square sail being pushed through space by a red laser beam. Earth is in the background.
The ultimate goal of the lightsail project is to drive a freely accelerating lightsail that is 10 square meters in area and 100 nm or less in thickness.Credit: Breakthrough Starshot / Breakthrough Initiatives

The idea of traveling through interstellar space using spacecraft propelled by ultrathin sails may sound like the stuff of sci-fi novels. But in fact, a program started in 2016 by Stephen Hawking and Yuri Milner, known as the Breakthrough Starshot Initiative, has been exploring the idea. The concept is to use lasers to propel miniature space probes attached to “lightsails” to reach ultrafast speeds and eventually our nearest star system, Alpha Centauri.

Caltech is leading the worldwide community working toward achieving this audacious goal.

“The lightsail will travel faste...

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