With the continuous development of space science and technology, this mythical speculation has increasingly inspired people to explore and find.
It is remarkable that scientists can suggest that there is life outside the earth, and even speculate that there are aliens smarter than us. However, some people will use the traditional theory of the formation and existence of life on earth to measure alien planets, forgetting the differences in geographical conditions and natural environment between them.
Professor Hickler, a scientist, created a Jupiter environment completely different from the earth's environment in the laboratory, and successfully cultivated bacteria and mites under such environmental conditions, thus proving that life is not the "patent" of the earth. All living things on our planet don't live in the same pattern. Oxygen is an important condition for biological metabolism; But there is an anaerobic bacteria, it does not need oxygen, with a certain amount of oxygen, it will die of poisoning. High temperature can sterilize and kill life; However, there is a kind of bacteria living at 140℃ on the seabed. If the temperature is not high, you will die. It is estimated that there are thousands of creatures on the earth that don't obey the conventional life theory, but we haven't found all of them yet.
Some people think that the earth's environment is perfect, with only one atmosphere, normal temperature and humidity ... In fact, these standards are decided by geographers. In fact, all kinds of life on the earth do not necessarily live in the "free kingdom", but they are bound to be subject to various restrictions. We should not cover other planets with the living conditions on the earth. Each planet has its own specific conditions. If there are Martians on Mars, and the surface temperature is 15℃ ~- 150℃, then they may think that there are no earthlings at all at the temperature of the earth.
Thus, in the research field of life theory, planetary biology came into being. This paper mainly studies the natural conditions of various planets outside the earth, whether there are creatures suitable for these environmental conditions, whether terrestrial creatures can migrate to planets outside the earth, and new methods for discovering planetary creatures. Because creatures often have a hidden instinct, even if it exists, it is not necessarily easy to be found. For example, there are many microorganisms in earth space, but who can find them with their eyes? At present, the exploration of Mars, Venus and Jupiter has just begun, and it seems too early to assert that there is no life on these planets.
With the deepening of human understanding of nature and the rapid development of contemporary science and technology, it is not surprising that people put forward the problem of life and even advanced civilized society on planets other than the earth. Driven by curiosity, scientists tried their best to find the truth, so they began their scientific exploration of "extraterrestrial civilization" more than 20 years ago.
On the question of whether there is intelligent life in the vast universe outside the earth, scientists are divided into two factions: one faction believes that since the earth where we live is the most common planet, intelligent life should exist and spread widely in the universe. Others say that although life may exist and be widely distributed in the universe, it is extremely unlikely that the specific environment needed for the evolution of single-celled organisms into human beings will appear, so there can be no intelligent life outside the earth. As far as the development of science is concerned, this argument is normal and beneficial, which will promote the exploration of "extraterrestrial civilization".
Jill Tate, an American astronomer, is the initiator and head of the Phoenix project. In the early 1970s, he began to participate in the exploration of extraterrestrial intelligent life.
As a project of SETI, the ongoing "Phoenix Project" is the most advanced and the only project that is likely to search for pulse signals. After the US Congress suspended its budget in 1993, it continued the work of NASA with private funds only. The project has the largest radio telescope in the world, pointing to more than 1000 planets within 150 light years. "Phoenix Project" developed its own "customized" electronic equipment and moved it to major telescopes by trailer.
1995 65438+ 10, Tate and several engineers came to the Parks Radio Observatory in Australia to make the first observation according to the Phoenix Project.
When Tate's team left Australia in July 1995, they had observed about 200 stars. Although there were many false alarms, which excited the members of the research team for a while, they didn't catch the alien signal. However, Tate proudly said, "We didn't bring back any mystery."
1In July, 1996, Tate made the latest progress report of "Phoenix Project" at the 5th International Conference on Space Biology held in Italy. In the southern hemisphere observation stage of the project, 202 sun-like stars were observed using the 63-meter telescope in New South Wales, Australia. Although no alien signals have been found, Tate believes that success is only a matter of time, because by comparing the data observed here with the data obtained by a small telescope 230 kilometers away, the researchers tracked and identified all interference signals originating from the earth.
"There is no alien signal to prove that there are no aliens." Tate said in the report: "This shows that there is unlikely to be a strong signal like interstellar radar around the Milky Way."
Before 1998, the electronic equipment of "Phoenix Project" was installed on the 42-meter antenna of the National Radio Observatory, where researchers planned to scan sun-like planets. 1998, the Phoenix Project was transferred to a giant dish antenna 300 meters away from Arecibo, Puerto Rico to continue.
Maybe a few years later, the "Phoenix Project" will really bring some surprises and more reliable evidence to the people on earth. We are looking forward to that day.