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About 4.5 to 5 billion years ago, the giant nebula in the spiral arms of our galaxy contracted by shock waves from supernova explosions, creating a solar system nebula.
The solar nebula began to rotate as it contracted. -
As the solar nebula rotates faster and gravitationally contracts, many materials gather in the center of the nebula, forming a primitive sun, while the periphery is flattened by rotation, creating a disk-like nebula.
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Asteroids collided and coalesced to form planets.
Heavy matter gathered near the sun, rocky planets, and distant light gathered, forming gaseous planets. -
In the center, the temperature rises and the sun shines on its own. In the periphery, the nebula rotates, forming a multi-layered loop of matter, and colliding and agglomerating, forming a number of microbes.
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The earth was transformed and ecologically formed by ice ages and various volcanic eruptions.
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The internal structure of the Earth is layered in spherical shells: an outer silicate solid crust, a highly viscous asthenosphere and mantle, a liquid outer core that is much less viscous than the mantle, and a solid inner core.
