2021-02-23

Humans are not alone! Research says there are a large number of terrestrial planets in the Milky Way: or there is life

By yqqlm yqqlm

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Humans are not alone! Research says there are a large number of terrestrial planets in the Milky Way: or there is life

Although humans have been searching for other life forms in outer space, there is no breakthrough discovery so far. Of course, the atmosphere and liquid water are the two prerequisites for the formation of life, which also means that if a planet possesses life, these two conditions must first be met.

Previously, researchers believed that after the birth of the solar system, some gas and dust formed a protoplanetary disk and revolved around the newborn sun. In these protoplanetary disks, there are microplanets with a diameter between 1 and 100 kilometers, and there are protoplanets with a diameter of about 1,000 kilometers.

Humans are not alone! Research says there are a large number of terrestrial planets in the Milky Way: or there is life(1)

In the protoplanetary disk, gravel Will take the initiative to fly to the protoplanet. Therefore, with the increase of time, the formation of planets may be due to the collision and fusion of asteroids, as if a handful of plasticine were pinched together.

For this reason, scientists used models to simulate the formation of planets in the Milky Way galaxy based on their current understanding of the formation of the earth and other planets in the solar system. It turns out that there are a large number of planets in the Milky Way that are similar to the Earth, with land and liquid water, which also means that they are likely to have life.

Researchers say that when the mass of the Earth has increased to one percent of the current mass, it will begin to grow by capturing the pebbles filled with ice and carbon in the protoplanetary disk. This process has continued. In about 500 years, its quality was comparable to that of today’s earth.

Humans are not alone! Research says there are a large number of terrestrial planets in the Milky Way: or there is life(2)

In addition, the The earth’s surface temperature rises sharply, causing the ice in the pebbles to evaporate into water. This also led to the fact that although 70% of the earth is covered by water today, its mass is less than 0.1% of the earth.

This also further shows that the matter in the protoplanetary disk determines whether there will be water and the amount of water in the planet, and this is also a key factor in whether there will be life.