The sun was born about 5 billion years ago, and after a long evolution of 5 billion years, it has become a colorful world today.
5 billion years, it seems to be a long time, but did you know that Milky Way has a history of 10 billion years.
After the birth of the solar system, it began to orbit the Milky Way. In addition to the sun, there are hundreds of billions of stars in the Milky Way like the sun, all of which are orbiting the supermassive black hole in the center of the Milky Way.
The diameter of the Milky Way reaches 200,000 light-years. Just like a metropolis, the center of the city is a supermassive black hole, surrounded by high-density and fast stars, which can rotate around the Milky Way every ten minutes on average.
The Earth and the Sun are located in the suburbs of the metropolis, about 26,000 light-years away from the supermassive black hole in the center of the Milky Way. The solar system carries 8, the large planet and other small celestial bodies, and runs wildly at a speed of 220 kilometers per second, and it takes up 250 million years to orbit the Milky Way for a week.
One week around the Milky Way is an galaxy years. In other words, since the birth of the Sun, we have only spent 20 Milky Way Years!
At the beginning of the birth of the Milky Way, it quickly formed hundreds of millions of stars using the raw materials ejected from the Big Bang. However, as time goes by, the number and speed of stars being born gradually began to decline, and until today, only about 5 new stars can be born in the Milky Way every year.
There will be new stars born, and there will inevitably be stars aging. Older stars usually explode strongly at the moment of death, especially the supernova bursting out of after the death of massive stars, which will eject a large amount of gas and dust, as well as heavy metals, which will become the raw materials for the new generation of stars and planets.
. In billions of years, our neighbor, Andromeda galaxy, will collide with the Milky Way. After a long period of fusion, the two major galaxies will merge into a larger galaxy. At that time, the solar system may undergo earth-shaking changes. If humans still exist at that time, they must consider leaving the solar system to find a new home.
The Milky Way is lit up by hundreds of billions of stars, but after trillions of years, new stars will no longer be born. As the stars slowly disappear one by one, the day of the Milky Way's death will come.
Without stars shining on space, the Milky Way will become pitch black and completely become a dead place.
Fortunately, that will only happen in the distant future, and now is the best era. Both the Milky Way and the Solar System are in the most stable era. Human beings have plenty of time to develop their own civilization, and they are fully capable and have enough time to leave the Milky Way before the Milky Way dies and build a second home in distant space!
