Yesterday I read an article on Baidu Know that when the speed of the spacecraft reaches 10%, it will take 40 years to fly to Centauri.

Hello, this question should come from the program "Breakthrough Stars". On April 13 this year, Hawking Weibo brought an exciting news-the "Breakthrough Star Photo" program was launched, and a miniature flight probe will be sent to Alpha Centauri four light years away. Russian billionaire yuri milner is one of the initiators of this project, and he invested 654.38 billion dollars in this project. The plan of "breakthrough shooting stars" is as follows: within a generation, the goal of breakthrough shooting stars is to develop a "nano-aircraft": an automatic space probe with a mass of grams, which is pushed to one-fifth of the speed of light by a laser beam, that is, the speed of 65438+1000 million miles per hour, which is1000 times that of the fastest spacecraft at present. If successful, this overflight mission will reach the habitable area near Alpha Centauri, which is 4.37 light years away from the Earth, and capture the images and other scientific data of the planet with its camera, communication equipment and processor, and send them back to Earth four years later.

For information transmission, the spacecraft going to Centauri should solve whether the ground can receive the detection data and realize such long-distance measurement and control communication. American traveler 1 just arrived at the edge of the solar system, and the communication with the earth was delayed 17 hours. If the existing electromagnetic wave communication means are used, the time extension to Alpha remy martin will be more serious, which will seriously affect the promotion of TT&C communication and exploration projects. At present, scientists have been experimenting with laser communication, which is six times faster than electromagnetic waves. 20 14 On June 6th, NASA announced the successful completion of a technical demonstration that may fundamentally change the future space communication, and transmitted a high-definition video from the International Space Station to the ground with a laser beam. The application of this technology in the field of space exploration in the future will provide great communication convenience for long-distance Ad Astra. Another strategy is to build a relay station to transmit in space through the relay station, so as to provide guarantee for Ad Astra in the future.

The speed of light (about 300 million m/s in vacuum, and the defined value of the speed of light is (c=299792458m/s=299792.458km/s).

Therefore, as long as this technology is broken, it won't take long. If not, continue to use electromagnetic waves. Electromagnetic waves travel at the speed of light in space (vacuum environment), and the destination Centauri is 4.37 light years away from the earth. So, in general, it should not take decades, but there may be a delay of several years.

Personally, I prefer technology. I hope you can point out any problems and help you!