Protoplanets: The Earth Was A Collection of Dust.
Was the earth dust?
The Earth began with a collection of dust called “protoplanets”
The current solar system was originally called the Solar Nebula.
It is said that it was born about 4.6 billion years ago.
At that time, there was only a small amount of dust and gas around the sun.
This dust accumulated more and more and became a protoplanet cloud.
In addition, meteorites collided with it many times, and the water and carbon dioxide contained on the surface of the earth evaporated, which became the atmosphere.
Due to this atmosphere, the heat on the surface of the earth does not leak into outer space.
Finally, this means that the environment in which living things are born is ready.
Currently, more than 100 million species of organisms live on the earth.
It is said that the first source of living things was born on the earth about 3.8 billion years ago, but it is not yet clear what kind of living things it was.
– Universe Today: Protoplanets
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