In the process of cosmic events such as star explosions, heavy elements are discharged into space and become dust floating in the universe. After countless billions of years of drifting and gathering, these dust recombine with dust such as hydrogen to form a nebula, the main component of which is hydrogen.

In the process of the nebula evolving into a star again, hydrogen is compressed, re-ignited, thermonuclear fusion occurs, and new stars are born. While light elements such as hydrogen polymerize to form stars, these relatively heavy elements form planets around the stars in the dust around the new stars, so these planets are basically formed at the same time as the stars.

Now let's talk about where the heavy elements such as gold and silver on the earth come from. They are other stars that existed "nearby" before the sun existed. After the explosion, various elements were produced, which remained on the earth in the process of nebula regeneration and evolution into new stars like the sun and planets like the earth.

So now the sun is definitely not the first generation of stars, but the second and third generation of stars. In fact, not only heavy elements, but all elements heavier than hydrogen and helium, including all elements that make up our human body, have evolved step by step in the life of stars. From nothingness to the present, the universe has evolved for 65.438+038 billion years.

Extended data:

By the end of 20 16, China's proven gold reserves reached 1.2 1 10,000 tons, ranking second in the world after South Africa. The overall development of China's gold industry is healthy and stable, with gold as the main industry and multi-metals. In 20 16, the trading volume of China gold exchange reached 24,000 tons (unilaterally), futures exchange reached 39,000 tons (unilaterally), and commercial banks traded 7,000 tons, with a cumulative trading volume of 70,000 tons.

References:

People's Network-That's how the gold on the earth came from.