Hawking’s opposition to China’s “eye of heaven”? What can the eye see and expose us

Over the years, we have been exploring the universe. On the one hand, we hope to find other habitable planets to prepare for future interstellar migration. On the other hand, we also hope to find signs of extraterrestrial life. Of course, up to now, we haven’t found an exoplanet completely similar to the earth, and we haven’t found any extraterrestrial life. Is our earth and human being unique in the universe? Although we have not found extraterrestrial life, many scientists believe that there may be alien life and civilization in the universe. British scientists have calculated that there may be at least 36 alien civilizations in our galaxy that can transmit radio signals like our own. Although this is only the result of calculation, scientists have taken many factors into account in the calculation. Therefore, this data may have certain reference significance. After all, the number of earth like planets in our galaxy is numerous, and it is possible to have some habitable planets. If some habitable planets also have the origin of life, and the origin of life is earlier than us, advanced alien civilization may be developed. In terms of the number of planets and the age of the universe, the universe should have sufficient conditions to support the emergence of life. The reason why we haven’t found the alien civilization may be that we are so far away from each other that our equipment can’t find them yet. However, with the development of science and technology, our observation equipment is becoming more and more advanced. We can not rule out the signs of alien civilization. For example, our country’s “sky eye” with a diameter of 500 meters is very powerful, and alien civilization may be found. Therefore, there are also some claims that some scientists are against the construction of the sky eye, for fear of exposing our earth. But is it really the case? In fact, whether Hawking is against the construction of the sky eye radio telescope is open to question, because the sky eye will not expose our earth. From the modeling point of view, the sky eye radio telescopes generally look like a big pot. This is because the radio signals from the depths of the universe reach the earth so weak that we can’t directly receive these weak signals. Scientists use a paraboloid as a mirror to collect these weak signals, so radio telescopes are generally like a pot. In terms of modeling, radio telescopes are actually similar to radars, but there is a big difference between them, that is, radars will transmit signals first and then receive reflected signals, while radio telescopes only passively receive radio signals from the depths of the universe and will not actively transmit signals, so the sky eye will not expose our earth. We can understand radar and radio telescope in this way: radar is a little like the flashlight we use to illuminate, which will expose itself, but radio telescope is just like our eyes, which can directly see the light from afar, and we will not find us in the distance because we open our eyes. As the largest single aperture and highest sensitivity radio telescope in the world, Tianyan has 10 times the overall performance of Arecibo radio telescope. As of August 28, 2019, sky eye has found 132 high-quality pulsar candidates, of which 93 have been confirmed as newly discovered pulsars. With the continuous exploration, there will be more discoveries in the future, and even may find signs of alien civilization, reproduce the early image of the universe, and extend the observation of neutral hydrogen to the edge of the universe. Therefore, Tianyan’s achievements are many, and there will be many unexpected discoveries in the future, which are worth looking forward to. Huawei mate40 concept machine exposed, Kirin 1020 + curved surface full-scale screen, beauty hanging on iPhone 12