Breakthrough Starshot – Wikipedia

https://en.wikipedia.org/wiki/Breakthrough_Starshot

EXCERPT:

Breakthrough Starshot is a research and engineering project by the Breakthrough Initiatives to develop a proof-of-concept fleet of light sail spacecraft named StarChip,[1] to be capable of making the journey to the Alpha Centauri star system 4.37 light-years away.

A flyby mission has been proposed to Proxima Centauri b, an Earth-sized exoplanet in the habitable zone of its host star, Proxima Centauri, in the Alpha Centauri system.[2] At a speed between 15% and 20% of the speed of light,[3][4][5][6] it would take between twenty and thirty years to complete the journey, and approximately four years for a return message from the starship to Earth.

The conceptual principles to enable this interstellar travel project were described in “A Roadmap to Interstellar Flight“, by Philip Lubin of UC Santa Barbara.[7][8]Sending the lightweight spacecraft involves a multi-kilometer phased array of beam-steerable lasers with a combined coherent power output of up to 100 GW.[9]

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