Are there aliens in outer space?

Although scientists believe that it is impossible to fly to the earth even if there are aliens, they have not denied the possibility of intelligent life in outer space.

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 UFO research craze 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". It 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 explain this phenomenon through psychological inference from the problems that modern people may face. Descriptions of UFOs include: fast moving or hovering; Silent, erratic or growling when moving; According to the current statistics, the shapes of plates, cigars, spheres, rings or ellipses have reached 100.

Records of UFOs around the world have existed since ancient times. However, on June 24th, 1947, the American media reported the UFO sighting by Arnold, which made whispers, who was curious by people all over the world, appear in front of people and caused 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 it is impossible to fly to the earth even if there are aliens, 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 triggered a "extraterrestrial civilization" fever. Some scientists believe that aliens must exist, but it is not easy to find a planet with life like the 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 of 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 (the earth has been/kloc-0.0 million years), then the countdown may only be 250 planets. If they are evenly distributed in the Milky Way, the nearest one is also 4600 light years. In the universe, there are 654.38 billion extragalactic galaxies like the Silver System.