Tau.Neutrino said:
Full Braking at Alpha Centauri
In April last year, billionaire Yuri Milner announced the Breakthrough Starshot Initiative. He plans to invest 100 million US dollars in the development of an ultra-light light sail that can be accelerated to 20 percent of the speed of light to reach the Alpha Centauri star system within 20 years.
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“Moreover, the lightweight spacecraft would have to navigate independently and transmit its data to Earth by laser.”
And how is this lightweight spacecraft going to get enough power to transmit its data to Earth by laser?
It is almost more realistic to say that they’ll use Alpha Centauri’s light power to send it back to the solar system.