The communication problem is not without solutions. Scientists are already conducting experiments on laser pointer communication. Laser communication is 6 times faster than electromagnetic waves. On June 6, 2014, NASA announced that the agency used a laser beam to transmit a high-definition video from the International Space Station back to the ground, successfully completing a technology demonstration that may fundamentally change future space communications.
In the future, the technology will be applied to the field of space exploration when it is mature, and it will provide great communication convenience for long-distance interstellar exploration. Another strategy is to build a relay station, which will provide a guarantee for interstellar exploration in the future through relay station transmission in space. But in any case, these interstellar communication methods cannot be broken in a short period of time.
How to go to the destination accurately? The “nano-aircraft” driven by light energy will be interfered by various other factors in space, such as gravitation, interstellar dust collision, etc., on its journey to Alpha Centauri. This will make the path of the probe to the destination appear very Large deviations, and in the context of the vast universe, a small deviation often leads to a far cry from the destination. How to correct this deviation?
The support of national power. Another challenge of Hawking’s project is the enthusiasm of the world’s major aerospace and space exploration power countries for exploration outside the solar system. Pang Zhihao said that, including the United States, because of the current human technology level and other factors.
At present, the major space exploration powers green laser pointer are and for a long time in the future, the center of gravity of space exploration is still the planets within the solar system and other related celestial bodies. If the cost is huge and the key technology has not yet broken through, it is difficult for any country to be willing to conduct ultra-high-risk extrasolar space travel exploration through national behavior.