First of all, you need to understand what life is in general. Metabolic processes occur in living organisms, unlike inanimate organisms. These are homeostasis, metabolism, organization, growth and development, adaptation, reproduction.
Also, conditions must contribute to the existence of life on a given planet. And since it takes millions of years for living organisms to become autonomous, habitable conditions must be maintained for a long time.
Earth is now considered the only planet whose conditions are suitable for life. Moreover, scientists believe that from 5 to 100 million species of organisms live on our planet, but only 2 million of them have been detected.
There are also several components that help support life. For example, this is water. It is known that the first living organisms on our planet lived in water. According to this, extraterrestrial life is possible only on a planet with water.
However, the temperature on the planet should not be too high or too low. It should be in the range where the water is liquid.
Experts now know of three planets on which life could theoretically exist.
Among other important features of inhabited planets, scientists distinguish the presence and composition of an atmosphere, as well as the presence of a magnetic field on the planet that protects against stellar radiation.
Source: Ferra
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