The unsolved mystery of Ozma project

A few days ago, American scientists said that extraterrestrial civilizations with advanced intelligence may establish mutual contact by sending signals to other planets, which is very similar to the Internet used by human beings. But the difference is that aliens have established a more advanced cosmic Internet.

John Lende, a scientist at the University of Hawaii in the United States, and his colleagues are working on the study of alien signals, focusing on Cepheid variable stars with changeable luminous laws. Cepheid variables are chosen as the research object, mainly because their brightness is strong enough to ensure that humans can still see them at a distance of 60 million light years. Lund said, "If there is an alien signal, we can use the existing star data for analysis."

The researchers explained that the impact of a beam of energy on Cepheid variable star can cause its core to heat up and expand, thus causing its vibration. The most likely energy impact method is to emit a beam of high-energy particles, such as "neutrinos", to Cepheid variable stars. That can shorten the bright period of variable stars. This is the same as stimulating people's heart regularly with electric current to promote the heartbeat. Normal cycle and shortened cycle can be replaced by binary codes "0" and "1" respectively. In this way, information can be transmitted back and forth in the network of the Milky Way or between these Cepheid variables. Lende said, "The beauty of this idea is that we have mastered the brightness change data of Cepheid variable stars for a century. Therefore, this idea can be seen as a new way to detect alien signals. "

According to the analysis and calculation of scientists, based on a galaxy with an average of 30 billion stars, stars with planetary systems like the sun account for about 25%, that is, 7.5 billion stars. If only 1.7% of the planets owned by these stars can develop into some "biospheres", there may be1.300 million Earth-like planets in the Milky Way. Considering other factors in the evolution of life and civilization, it is estimated that there should be 32,500 planets in the Milky Way, which are equivalent to life forms on earth. Since 1995, planets outside the solar system have been discovered one after another, and more than 40 kinds of interstellar molecules have been discovered, many of which can become life substances. Therefore, many scientists believe that there are human "bosom friends" in the depths of the universe and "life symphonies" outside the earth. But where are the aliens hiding? What are their life forms? All these problems attract people to use the achievements of space science and technology to find the traces of extraterrestrial intelligent life and extraterrestrial civilization.

Since the 1950s, many countries have begun to look for clues of "aliens" by listening to the radio waves emitted by the earth. 1960, the United States made an "Ozma" plan to monitor the radio waves of two constellations in the universe by using radio observatories, but no results were obtained. 1985 "Tami" project was implemented, and 840 radio channels were used to scan cosmic celestial bodies, which is equivalent to 1 minute to complete 1 10,000 "Ozma" projects. 1992, the United States implemented the "Phoenix" program to search for intelligent creatures in outer space, using the largest astronomical telescope and radio telescope at that time to search for radio signals of different wavelengths emitted by various celestial bodies in the universe. In addition, 1974, 1 1 In June, the United States sent a telegram from the observatory to the aliens in the universe, conveying the information of the earth and human beings, but there was still no news.