What is the History of the Solar System?
The formation and evolution of the solar system began with a small gravitational collapse in a huge molecular cloud 4.6 billion years ago. Most of the collapsed mass is concentrated in the center, forming the sun, and the rest is flattened and forms a protoplanetary disk, which in turn forms planets, satellites, meteorites and other small solar system celestial systems.
Formation and evolution of the solar system
- Thoughts about the origin and destiny of the world can be traced back to the earliest known written records; however, in most of those times no one attempted to link such a theory to the existence of the "solar system" for a simple reason, because It is generally not believed that the solar system we know now exists. The first step towards the theory of solar system evolution is to
- Planets were originally thought to have formed in or near their orbits as we see them today. But this view changed dramatically in the late 20th and early 21st centuries. It is now thought that after the initial formation of the solar system, it looks very different from the present: the inner solar system has several celestial bodies at least as large as Venus, and the outer solar system is closer than it is now,
- Satellites exist around most planets and other solar system objects. These ones
- Astronomers predict that what we know today as the solar system gathers all hydrogen in its core into helium, that is, evolved in stars
- Solar system along a distance
- The time frame for the formation of the solar system was determined using radioisotope determination methods. Scientists estimate that the solar system is about 4.6 billion years old. The oldest known mineral particle on Earth is about 4.4 billion years old. Because the surface of the earth is often
- Note: All times and years in this chronology should only be considered as orders of magnitude.
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| Billions of years before the formation of the solar system | Previous generations of stars survived and died, throwing heavy elements into interstellar matter, from which the solar system formed. |
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Formation of the solar system | 0 --1 × 10 5 years | The former solar nebula formed and began to collapse. The sun began to form. |
1 × 10 5 5 × 10 7 years | The sun is a protostar of the Taurus T star type. | |
1 × 10 5-7 years | Outer planet formation. In 1997, the gas in the protostellar disk was blown away, and the formation of peripheral planets may be completed. | |
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Main sequence star | 5 × 10 7 years | The sun becomes a main sequence star. |
2 × 10 8 years | The oldest rock formation on earth. | |
56 × 10 8 years | Jupiter and Saturn's orbital resonance moved Neptune to the Kuiper Belt. The later heavy bombing period began in the inner solar system. | |
8 × 10 8 years | The earliest known life appeared on Earth. | |
4.6 × 10 9 years | Today, the Sun is still a main sequence star, warming and heating about 10% every 109 years. | |
6 × 10 9 years | The habitable zone of the sun moves out of Earth's orbit and may move to Mars' orbit. | |
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Post-main sequence star | 1012 × 10 9 years | The sun runs out of hydrogen in its core, ending life in the main sequence. The sun begins to rise to the red giant branch in the Herodias, becoming brighter (to 2700 times), larger (radius to 250 times), and colder (down to 2600K): the sun becomes a red giant. Mercury, Venus and Earth could be engulfed. |
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Sun wreck | > 12 × 10 9 years | The white dwarf sun no longer generates energy, begins to cool down and dim, and finally moves towards the black dwarf stage. |
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