Hawking warned Five-hundred-meter Aperture Spherical Radio Telescope (FAST) not to detect cosmic sound waves. What did China's eye detect in the universe?

First of all, China's "Eye of the Sky" detects electromagnetic waves instead of cosmic sound waves. Secondly, Stephen Hawking never warned China's Eye not to detect electromagnetic waves in the universe.

Stephen Hawking warned the 500-meter spherical radio telescope (FAST) not to detect electromagnetic waves in the universe. The so-called reason is that doing so will attract alien civilizations, thus putting human beings in danger, which is very popular in street stall articles. However, Stephen Hawking has never issued such a warning.

However, Stephen Hawking does worry that human beings will face some risks when they take the initiative to contact extraterrestrial civilization, because we have no way of knowing whether aliens are kind or malicious. It doesn't matter if they can't come to the earth, if they can, it will be in big trouble, because the technology of this alien civilization far exceeds that of human beings. If there is a conflict, we will let them fish.

In short, Stephen Hawking warned that it is risky for human beings to take the initiative to contact alien civilizations. However, China's Eye of the Sky will not communicate directly with possible alien civilizations, because the Eye of the Sky is a radio telescope whose main function is to receive electromagnetic waves from the universe, instead of sending electromagnetic waves into the universe to announce the existence of human beings. Therefore, alien civilization will not know that human beings use the eye of the sky to explore the universe.

As for what our celestial eye has detected in the universe, it is mainly some pulsars, including millisecond pulsars. Studying pulsars can give astronomers a deeper understanding of the evolution of stars and can also be used to study gravitational waves. In addition, pulsars may provide navigation functions for deep space probes in the future.

Theoretically, if the alien civilization sends out powerful radio waves, the eye of our country can receive them. But so far, Tian Yan has not made such a discovery.