Does extraterrestrial life exist?
UFOs exist in mysterious ways, and tens of millions of people on earth claim to have seen UFOs. Are these "witnesses" dreamers or liars? Or is there something between a lie and the truth? Is the answer a planet in space, or does it come from human worship of mystery?
The first upsurge of UFO research in the world began with the most famous "Arnold incident" in the history of UFO research. UFO is an English abbreviation, which means "UFO", also known as "UFO" or "UFO". Refers to a moving flying object or astronomical scene, which can be observed with the naked eye or monitored by radar, but human beings can't explain it at present. People who are interested in UFO not only speculate that it comes from a more advanced civilization than the earth, but also use psychological inference to explain this phenomenon from the problems that modern people may face. Descriptions of UFOs include: fast moving or hovering; Silent, erratic or growling when moving; Shapes such as plate, cigar, sphere, ring or ellipse, according to the current statistics, have reached 100 different shapes.
Records of UFOs around the world have existed since ancient times. However, on June 24th, 1947, 1947, the American press reported Arnold's UFO sighting in a large space, which made people all over the world curious and whispering in front of people, causing a sensation all over the world.
However, in the exploration of the universe, the exploration of aliens can arouse people's interest most. Although scientists believe that even if there are aliens, it is impossible to fly to the earth, but they have not denied the possibility of intelligent life in outer space.
Nebula NGC6543, nicknamed "Cat's Eye" Nebula
Recently, two scientists discovered that two planets outside the solar system may have the conditions for life, which even aroused a fever of "extraterrestrial civilization". Some scientists think that aliens certainly exist, but it is not easy to find a planet with life like Earth. If there are planets, there is not necessarily life; Life does not necessarily mean more advanced life, it requires that the position of the planet to the parent star must be just right. According to such conditions, there are only about 6.5438+0 million planets in the Milky Way. In this 654.38+million, there must be a series of conditions for the formation of life, including water, oxygen and various chemical elements. And if the aliens on those planets have a highly developed civilization, and their history of sending radio signals to the sky is much earlier than that of the earth, which has been 1 10,000 years (our earth is only 100 years old), then it is possible to count down only 250 planets. If they are evenly distributed in the Milky Way, the latest one is 4,600 light years. In the universe, there are 654.38 billion extragalactic galaxies like the Silver System.
In order to communicate with possible alien creatures, so far, human beings have carried out 50 plans to search for radio signals in outer space, all of which ended in failure, but another way for human beings to find alien civilization, that is, to directly detect outer space by using artificial spacecraft, is still in progress. During the period of 1966, U Dan, then Secretary-General of the United Nations, asked Von Keviczky, a UFO researcher, to study how to put UFOs on the agenda of the United Nations. 1978, the First Committee of the 33rd UN General Assembly adopted the deliberation draft put forward by the Grenada government, suggesting that all member countries coordinate the scientific research and adjustment of extraterrestrial life, including UFOs. 1979, the 43rd session of the United Nations General Assembly adopted a proposal to study UFOs as a worldwide topic, and pointed out in the outline of the 47th session: "The study of UFOs involving all mankind should be a part of human efforts to solve world social, economic and political problems." 1977 the first UFO international conference was held in Mexico. 1983 the second UFO conference was held in Brazil.
Right or wrong
1972 and 1973, the United States launched Pioneer 10 and 1, Voyager1and 2 to explore distant outer space. "Pioneer" 10 and 1 1 each carry a message of congratulations written on a gold-plated plate. Voyager 1 No.2 and Voyager1No.2 each carry a gold-plated record called "Voice of the Earth", which is 30.5cm long and equipped with a playback device. It records greetings in 60 languages, 1 13 coded pictures depicting the customs of the earth (including the Great Wall of Wan Li), 35 kinds of natural sounds of the earth and 27 kinds of world famous songs. Voyager spacecraft carries the voice of the earth and the message signed by US President Carter to astronauts: "This is a gift from a distant small planet. It is the epitome of our voice, science, images, music, thoughts and feelings. We are trying to keep our time alive, so that you can understand our life. We look forward to solving the problems we face one day in order to join the civilized family of the Milky Way. This "voice of the earth" is to pin our hopes, our determination and our good wishes for the distant world on this vast and awesome universe. "
Voyager 1 and Voyager 2 fly at a speed of about 500 million kilometers per year. If all goes well, they will still send the information of the universe back to earth before 20 15. After that, they will turn off all the instruments because of the exhaustion of electricity, but they will still fly silently to the depths of space outside the solar system. The last hope comes from the expectation of the unknown. If travelers 1 2 meet intelligent aliens, maybe they can understand that there are nine big planets around a distant star and there are many lonely intelligent life in the world. They sincerely hope to find some "cosmic relatives" in the vast space.