How was the solar system formed, and how was the solar system formed?

At present, the Nebula theory is the dominant view. For more information, please refer to the encyclopedia.

Laplace Nebula Theory.

The formation and evolution of the solar system began with the gravitational collapse of a small patch 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 to form a protoplanetary disk, which in turn forms planets, moons, meteorites, and other small solar system bodies.

This is known as the widely accepted model of the nebula hypothesis, and was first proposed by Emmanuel Wittenburg, Immanuel Kant, and Pierre-Simon Laplace in the 18th century. Its subsequent development was intertwined with a variety of scientific fields such as astronomy, physics, geology, and planetology. Since the advent of the space age in the 1950s and the discovery of extrasolar planets in the 1990s, this model has been challenged and refined in the process of interpreting new discoveries.

Since its formation, the solar system has undergone considerable changes. Many moons are formed from a disk of gas and dust surrounding their parent star, while others are believed to have been captured or from a massive collision (as was the case with Earth's moon). Collisions between celestial bodies continue to occur to this day and are at the center of the evolution of the solar system.

The positions of the planets are constantly shifting, and some planets have translocated with each other. This planetary migration is now thought to have played a large part in the early evolution of the solar system.

Like the birth of the sun and the planets, they will eventually perish. In about 5 billion years, the Sun will cool and expand outward many times more than its current diameter (becoming a red giant), throwing its outer layers to become a planetary nebula and leaving behind the stellar remains known as white dwarfs. In the distant future, the planets orbiting the Sun will gradually be swept away by the gravitational pull of passing stars.

Some of them will be destroyed, others will be thrown into interstellar space. Eventually, trillions of years later, the Sun will be on its own, with no other celestial bodies in orbit in the solar system.

Chronological table of the evolution of the solar system.

Note: All times and eras in this chronology should be considered as orders of magnitude only.

As mentioned in the documentary, at the beginning of the universe, there was only the first hydrogen element (the lightest and simplest gas) and then the hydrogen gas was gathered together by gravity to reach the hydrogen element collision and start nuclear fusion, so that the first generation of stars produced fusion to produce new elements such as helium, carbon, neon, oxygen, and finally iron, and each level of fusion will release energy, but iron fusion will not produce energy, but absorb and react with its own gravity, causing gravity to become stronger and hotter, and finally supernova** ** After that, there is the nebula, from which heavier elements such as lead, platinum, gold, etc., and** The center pulls the gas back through gravity and starts the second fusion, and the energy of the fusion blows the gas away and finally forms gas stars such as wood, earth, king, and neptune, and forms water, gold, earth, and fire entities at the near point, and our sun, according to astronomers, is produced by the secondary fusion after the explosion of ancient stars.

How is the solar system composed? First of all, the Earth is one of the major planets in the solar system, the closest to the Sun is Mercury, the farthest is Neptune, and the brightest is Venus.