When a common man looks at the sky at night, he only sees the shining stars and the moon. But scientists search for such planets among those stars where there is a possibility of life. Now the question arises that what do scientists see in a planet that they come to know that there is a possibility of life on this planet. Let us tell you about it in detail in this article today.
First of all, look for water
The presence of water is most important for life on a planet. Actually, water is necessary for most of the biological processes of life. From humans to plants, everything needs water to thrive. This is the reason why when scientists look for the possibility of life on a planet, they first want to see whether liquid water is present on or below the surface of the planet or not. The temperature and pressure of the planet should be such that water can remain in liquid state.
Temperature and composition of atmosphere
Apart from water, scientists also pay attention to the temperature of the planet. If the temperature on a planet is suitable for the existence of life, then it is considered a planet with a large population of 100 million people. "The Goldilocks Zone" Or "Habitable zone" It is said. Apart from this, scientists also pay attention to the structure of the atmosphere. Actually, the structure of the planet’s atmosphere is also important for life. If a favorable environment is needed for life, then the presence of oxygen, carbon dioxide, nitrogen and other gases is necessary.
Source of energy is also necessary is
Source of energy is necessary for life. Scientists believe that the planet should be at such a distance from its star that it keeps getting the right amount of light and heat. If light and heat remain equal on a planet, then the possibility of life increases there. Apart from this, the presence of chemical elements, the magnetic field of the planet and the stable surface of the planet and geographical activity are also necessary for the possibility of life on a planet.
Size and gravity of the planet
The size of the planet and the gravity present there are also important for the possibility of life on a planet. If a planet is very small, then its gravity may not be able to maintain the atmosphere. On the other hand, if a planet is very big, then too much gravity can be challenging for life. This is why scientists decide by checking these parameters whether there is a possibility of life existence on a planet or not.
