What are the conditions of life?

1) has the necessary components, and can synthesize organic substances with elements such as carbon, hydrogen, oxygen and nitrogen.

(2) Life needs moderate light and heat. If the temperature is too high, the chemical bonds of carbon atoms will be destroyed; If the temperature is too low, the biological process will stop.

(3) There is liquid water, which is an absolutely indispensable part of living things.

(4) Atmosphere has three functions. First, the atmosphere synthesizes organic matter through ultraviolet irradiation and electric spark; The second is to protect life safety from meteorites and cosmic rays; The third is to protect the heat on the earth's surface.

(5) The above conditions can be maintained for a long time, so that life has a process of emergence, development and evolution.

The above conditions are completely satisfied only by the earth. I used to have hope for Mars, but now I'm almost disappointed. Some people think that there may be life on Titan, where there is a primitive atmosphere similar to that of the earth, which is close to an atmosphere, but it has not been confirmed so far. It seems unlikely that life will be found in the solar system. Suffer from hell

——

To go to other universes, we need transportation. To move the earth, we also need transportation. Therefore, the development of rocket technology is directly related to human migration into space. In the last section, we talked about the development of rocket technology. Looking at the state of rocket technology, people's understanding of space, inflation and cosmology is still in its infancy, and so far there is only the idea of photon rocket. And some people think that the speed of light is a limit speed, and there is no matter that exceeds the speed of light. This often makes people feel sad about the universe. In fact, the universe is understandable and completely understandable. Only the universe we know may have a radius of more than 8 billion light years, but to really understand it, we have to take a look for ourselves. As far as a person's life is concerned, the prime time is only over forty years. Due to the limitations of past research, people who only visit a certain area of the universe in the field of frozen human bodies must extend their lives through freezing. But research shows that this is not a perfect method. The difficulty of this method is that there is no way to revive the human body after freezing. Some scientists also believe that the resurrection of the frozen human body is just an illusion. From the point of view of improving rocket speed, to get back and forth from the space we already know, we need a rocket with at least 200 million times the speed of light to solve a little (only) practical problem.