What are the necessary conditions for life to exist?

1, needs to synthesize substances, 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 also liquid water, which is an absolutely indispensable part of organisms.

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 production, development and evolution.

Extended data:

American probes discovered oceans on asteroids in the solar system.

According to the China Journal, a new study by NASA shows that the shiny salt layer on the surface of Ceres is left by its underground infiltration water, and there may be a huge ocean in its underground depth, which may have been inhabited by alien life or is suitable for life. On 20 1 1 year, the American Dawn probe began to observe Vesta and Ceres, the two largest celestial bodies in the asteroid belt of the solar system, becoming the first probe to orbit two deep-space celestial bodies.

In the final flight stage when the fuel was exhausted, the probe was only 22 miles away from the surface of Ceres, and a saline water reservoir was found inside it, which was 25 miles deep and extended for hundreds of miles.

Although salt water may be an extreme living environment, the existence of the ocean indicates that there may be more such salt water reservoirs in other parts of this dwarf planet, which increases the hope that Ceres may be a livable planet.

China Research Network-American probes discover oceans on asteroids in the solar system.

Fuzhou News Network-American probes discover oceans on asteroids in the solar system.