When you look up at the sky and see the stars twinkling in the deep night sky, you may wonder if there are intelligent life forms on other planets besides humans on Earth.
The frequent appearance of unidentified flying objects (UFOs) is due to alien visits to Earth, or is it a natural phenomenon or other reason that people cannot explain at present? This has aroused great interest in exploring life outside the earth.
Current scientific studies have shown that there is no life on the Earth's satellite, the Moon. Is there life on Mars? From the information obtained, the natural environment of Mars has many similarities with that of Earth.
In August 2011, American scientists announced that traces of flowing water had been found on Mars for the first time. Prior to this, it was also discovered that there was plate movement on Mars. These findings increase the likelihood of the inference that there is life on Mars.
In addition, there is a possibility that life will exist on Jupiter's second moon. In the vast universe, the solar system is just a very small system. Astronomers estimate that there are at least 1,020 stars in the known universe. In the Milky Way, there are also more than 1,011 stars.
Studies have shown that there are 2 billion planets in the Milky Way galaxy alone that are similar in size to Earth. Research data on the chemical composition of the interstellar medium indicate the presence of organic compounds such as amino acids on celestial bodies outside the solar system.
According to the results of a study published by NASA in 2011, there may be as many as 200 planets in the Milky Way with similar environmental conditions to Earth, and this number is very conservative.
Of the planets observed by scientists, 54 are highly likely to have "habitable zones" for extraterrestrial life. The so-called "habitable zone" refers to a terrestrial planet that is at a certain distance from the star around it and contains liquid water and life forms on its surface.
It follows that it is entirely possible for life to exist in the far reaches of space. However, what life on other planets will look like is still up to scientists to explore.
The United States launched the Pioneer and Voyager probes in 1972 and 1977. On a metal plate of Pioneer 10 is engraved images of adult naked men and women on Earth, with the man raising his right hand in greeting the intelligent life of the aliens.
On board the Voyager, there is a special gold-plated record "Sounds of the Earth", on which various audiovisual information about human beings is recorded: greetings to the "cosmic man" in nearly 60 languages (including Hokkien, Cantonese and Hakka), 35 sounds of nature, 27 classical songs (including Peking Opera and the ancient Chinese song "Mountains and Flowing Water"), 115 frames of photographs. Records are expected to last for up to 1 billion years in the universe.
In addition, many giant radio astronomical telescopes have been built to search space non-stop, hoping to receive signals from extraterrestrial life, but there has been no "alien" echo so far.
The 500-meter aperture spherical radio telescope (FAST), known as the "eye of China's sky", has discovered more than 800 new pulsars. Let's look forward to extraterrestrial life!
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