According to BIGBANG's theory, the origin of water can be traced back to 654.38 billion years ago.
In less than one trillionth of a second after the Big Bang, the energy that caused the outward expansion of space was transformed into a hot and uniform particle bath. In the next three minutes, these primitive components collided, pushed, combined and recombined with each other, resulting in the first atomic nuclei of the universe. Modern cosmology describes these processes mathematically and predicts the cosmic abundance of the simplest nucleus-a lot of hydrogen, a little of helium and a little of lithium.
As an important component of water, oxygen has not existed in this period, which means that there will be no such thing as water in the universe in a short time. After the Big Bang, 1 100 million years later, the first generation of stars had already formed. Deep in its fiery interior, simple nuclei fuse into more complex elements, including carbon, nitrogen and, of course, oxygen, but even so, water cannot be produced.
At the end of its life, when the first generation of stars become supernovae, violent explosions will spray a large number of different elements into space. At this time, oxygen atoms and hydrogen atoms finally meet and fuse together, forming a new substance in the universe-water.
As time goes by, more and more water is produced in the universe, and the process of each star becoming a supernova is also a process of producing a lot of water.
The solar system was born 4.6 billion years ago. It is a new galaxy formed after the death of the previous star, which absorbs a lot of substances from the previous star and its planet, including water. The young earth collided and merged with the previous generation of planets, and may have obtained a lot of water from it. But the early earth had no atmosphere and the temperature was extremely high. Even if water is obtained, it will be evaporated and dispersed in space, and only a small part will be buried deep underground.
Therefore, many scientists believe that the water on the earth may come from comets and asteroids now. In billions of years, countless comets and asteroids collided with the earth, bringing enough water to the earth.
But after all, the source of water on the earth is still inconclusive, so there are also arguments about the generation of solar wind and the water on the earth itself.