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by the novel coronavirus.
The epidemic is affecting everyone's heart, in outer space.
And alien planets, viruses and bacteria are also headaches for scientists and astronauts.
For nearly a century, advances in astronomy have made humanity aware of the insignificance and loneliness of ourselves and the Earth in the universe, which today has trillions of galaxies in a radius of 46.5 billion light-years.
Inside, although the scientists.
No living planet has been found other than Earth, but the pace of exploration for extraterrestrial life has been accelerating.
Once upon a time, scientists thought that life could only occur on a planet like Earth, which is located in the habitable zone, but it has been proven that life is far more tenacious than human imagination can be. <>
Water bears on Earth.
It is a group of organisms with a diameter of 50 microns to millimeters, which can "regenerate" when the environment deteriorates, thus reducing the Eocene Era to extremely low levels, and this "repositorious" state can be up to 120 years, and they are not afraid of the universe approaching absolute zero.
low temperature and strong radiation.
From a biological point of view, water bears are undoubtedly much more "tough and tough" than humans, but even more "tough and tough" are bacteria and viruses.
In mathematics, simplicity often means solidity, after all, the whole mathematical edifice is built on a few axioms that are too simple to be simple.
Similarly, simple bacteria and viruses as the primary form of life and parasites, their ability to adapt to the environment and even respond to changes in the environment is very strong, scientists have more than once worried that astronauts may have the presence of earth viruses, will mutate in space, and then pollute the earth, so they will undergo strict disinfection and isolation before going to the sky and after returning.
From disordered inorganic matter.
From organic matter to highly ordered life, the odds of this process are incredibly small for today's scientists.
However, in the eyes of human beings, events that occur once in 10,000 years or even once in a million years have become somewhat frequent in the history of the universe for hundreds of millions of years, so most people and scientists believe that the birth and evolution process of life similar to that of the earth will also occur on other planets in the universe. <>
From scratch, from simple to complex, the same evolutionary path will inevitably lead to the emergence of "basic life and parasites" such as bacteria and viruses on other planets, so the possibility of bacteria and viruses on other planets is very high.
Astronomers tell us about the solar system.
In the early days, Venus and Mars were still "habitable planets" with oceans and atmospheres, so theoretically these two planets may have had life in ancient times, and even decades later, humans will encounter "tough and tough" Martian bacteria and viruses in the poles and underground areas of Mars. <>
Summary. Bacteria and viruses outside of Earth are almost certainly present, and even they are within the solar system.
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No. Because viruses are a type of life, and there is no environment for life to live in space or other planets, there is no possibility of a virus.
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It's possible. Not all parts of the universe can be observed by man, and the laws of survival in other parts of the universe may be different from what humans know now.
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Personally, I think there may be some viruses on other planets in space, but the specifics are just speculation, and I am not sure yet.
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The virus grows rapidly in space, providing researchers with an opportunity to take a comprehensive look at HIV. In recent years, researchers in the United States have used the space station's bioreactor to grow HIV. Both parasites and microorganisms can grow rapidly in the weightless environment of space, which not only provides conditions for the development of new drugs, but also creates conditions for understanding the pathology of diseases.
For example, researchers in the United States have studied cancer cells in space and found that colon cancer cells can grow up to 10 millimeters in diameter, which is 30 times the volume of colon cancer cells grown in ground laboratories. This study proves that the weightless environment is conducive to the growth of tissues and cells, which not only provides conditions for observing tumor growth, but also provides clues for the manufacture of drugs that inhibit tumor growth and **cancer.
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For the 'Cryptography' in space.
Astronauts must always maintain a 'vigilant heart'.
1. Aerospace radiation.
It includes ionizing radiation and non-ionizing radiation, the former is mainly galactic cosmic radiation, geomagnetically trapped radiation and solar particles, and the latter is mainly optical radiation and radio frequency radiation.
2. Chemical contamination of the crew compartment.
It is mainly used for the metabolic volatiles of astronauts, the degassing and combustion products of non-metallic materials in the crew compartment, the leakage of storage containers or pipelines of toxic chemicals, the volatiles of food and daily necessities, and atmospheric suspended particles.
3. Sudden temperature changes.
The temperature in the cockpit or in the spacesuit rises or falls sharply due to accidents, which can easily lead to distraction, reduced endurance, reduced work efficiency, and even life-threatening for astronauts.
Fourth, aerospace noise.
It is mainly formed by rocket engines, electronic instruments and aerodynamic forces, which will affect astronauts' hearing, emotion, language communication, work efficiency, etc.
5. Aerospace vibration and shock.
From launch to return, manned spacecraft will produce strong vibrations and shocks. Vibration and shock can affect astronauts' vision, communication, operation ability, etc., and even cause mechanical damage.
6. Overweight and weightlessness.
During the launch and return of the spacecraft, the astronaut may feel 10 times overweight; During the orbital flight, the astronaut will be in a weightless environment for a long time.
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I believe that extraterrestrial life exists, after all, the universe is boundless, and since the earth can have life, why can't other planets produce a high degree of civilization! It is understood that there are 200 billion "brothers and sisters" of the sun in the Milky Way, and scientists have found 150 stars with planets orbiting them, which are distant relatives of the Earth. Even if one of the 10 stars has planets orbiting, then the earth should have 20 billion brothers and sisters in the galaxy, just like only the earth has advanced intelligent life among the nine planets of the sun, then there should be 100,000-150,000 planets suitable for the development of life, and then intelligent life will be produced to form a technological civilization, and they should have a civilization similar to or more advanced than the earth.
Even if aliens do exist, many scientists currently point out that the vast planets are so far away from each other that it is impossible for aliens to visit Earth. Wang Sichao believes that just as the people of Banpo Village six years ago could not imagine the scientific and technological development of mankind today, it has only been more than 100 years since the Wright brothers invented the airplane and now the spacecraft bombarded comets, and it is possible that aliens may have more advanced technology to visit the earth. Dr. Wei Han, a well-known UFO research expert, recently revealed a strange case that the US authorities had kept secret for many years.
"Aliens continue to visit Earth, and some of them have spacecraft crashes and crashed in some remote areas of the Earth, which are unknown," Wei Han said. "He said:
There are many such records in secret archives in the United States and Mexico. We have collected 15,000 ** official documents, in which we learned that at least two foreign spacecraft crashes in the United States in recent years. The U.S. denies having this information, but we are getting testimony from U.S. military veterans who have seen the bodies of these aliens.
We also received testimony from several coroners who had examined the remains of aliens. "We also got a batch of alien corpses photographed by the U.S. Navy," Willan said.
**The negatives have been tested by two reputable photographic experiments and have been confirmed to be not fakes, and the age is accurate, and there are no alterations, superimpositions, miniatures, etc. "One night in July 1948, the U.S. Air Force radar network found a high-speed flying unidentified object, and after tracking, it was found that it had crashed into Mexico, 30 miles south of the town of Laledo, Texas," said Wei Han, who showed the alien corpses on television.
Mexico** immediately sent troops to cordon off the scene and informed the United States**. Washington immediately sent a group of ** and experts to the city, and among the passers-by was a Navy photographer who photographed the **. The photographer, who is still in service, wrote us a letter in which she said:
If you make these secrets public, you will not be attacked by doubters, and you will be troubled by a secret agency in the United States, which is so secret that you cannot even imagine that it exists. I've cut out some of the people watching the corpse so that they don't get recognized. ”
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Is there or how many celestial bodies like Earth are there in the universe. The organic molecules on Earth do not fly from outside the sky, but they are possessed by themselves, and substances such as water and oxygen, which are necessary for the existence of life, are also abundant in the embryo of the Earth. What is important, then, is the external conditions that cause the evolution of these organic matter, that is, the light and heat conditions from the sun, which are the external conditions that enable the evolution of the earth's organic matter into living matter.
In other words, because the earth has the two conditions of organic matter and solar light and heat, it also has the necessary conditions for the existence of life. In this way, we just need to explore whether there are planets and star systems in the universe like the Earth-Sun. According to research, there are about 1% of stars of the same type as the Sun in the Milky Way, and at least 10% of them have planets, that is, 100 million stars like the Sun have planets.
So among these 100 million planets, are there any planets that are completely consistent with the internal and external conditions of the Earth? In fact, there are countless galaxies like the Milky Way in the entire universe. According to the theory of probability, we can think that there must be celestial bodies in the universe that are the same or similar to the earth in addition to the earth, that is, there must be living planets like the earth in the universe, but we have not discovered each other.
What, then, is the best way to connect with each other in the vast universe? In terms of human wisdom and scientific and technological level, the best means is electromagnetic wave communication. Radio telescopes currently in use can receive very faint signals from space, but unfortunately, there is no indication that these signals carry information from advanced intelligent beings.
Another way is to compile symbols that represent the characteristics of the earth into "passwords" to make "earth business cards" and use electromagnetic waves to emit them into outer space. If aliens are about as intelligent as humans, they have the opportunity to receive and decipher the content of our signals, and then they send them to Earth. But even electromagnetic waves emitted by the nearest star of exactly the same type as the Sun would reach the Earth.
Light-year. Suppose this star has planets, and there are highly intelligent life on the planets, and they receive signals and feedback information, and a round trip is enough.
Light-year. Therefore, it is almost impossible for humans to meet them.
Is there only one life in the universe that exists on Earth? The characteristics of living matter on earth are organic matter with hydrocarbons as the main body, oxygen as the exchange material for metabolism, and water as the basic substance for the formation of life. After these conditions are met, at the right temperature, organisms can be formed.
If life could be formed from other substances, it would certainly not be in environmental conditions like Earth. But as long as they are living beings, they must also exchange matter and energy to maintain life activities.
All in all, theoretically, earthlings are not lonely, and there may be "aliens" in the universe. But in practice, so far, no life on other planets has been discovered, let alone "aliens" visiting Earth.
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Viruses are thought to degenerate from small cells in large cells. If there is carbon-based life in space similar to ours, there is a good chance that there will be viruses as well.
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I think the first virus on Earth was acquired from many wild animals, which are the main environment for many viruses and bacteria. I think there are viruses in space, too.
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It is not known whether there is a virus in space, and the first virus on Earth must have come from Earth, because all life on Earth is the product of single-cell evolution from ancient times.
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