In reality, according to scientists, the Sun is just an ordinary star. It consists of 73% hydrogen, 25% helium, and small amounts of heavy elements. However, in about 5 billion years, the Sun’s life cycle will end, and the hydrogen within it will be depleted. The Sun will then transition into the phase of burning helium in its core. Meanwhile, at the outermost shell of the Sun, the fusion of two hydrogen atoms into helium will continue.
When it becomes a red giant, the outer shell of the Sun will expand to reach the orbit of Mars and engulf Mercury and Venus. While Mars won’t be swallowed by the Sun, it will be pushed out of the Sun’s atmospheric influence. As for Earth, even if our blue planet isn’t engulfed, the temperature will become too high, leading to the destruction of life.
After the depletion of helium, the Sun will become a white dwarf with a dense, hot core and be surrounded by a planetary nebula. Eventually, this white dwarf will cool down and fade away, becoming a black dwarf someday. However, even in theory, this process would take a very long time.
So, if we were to pour all the water on Earth onto the Sun, would it be able to extinguish this star? According to scientists, the answer is no. We cannot extinguish the Sun in this way because the Sun doesn’t burn through oxygen like on Earth. Instead, in the vacuum of space, the Sun exists through nuclear fusion, converting hydrogen into helium.
Therefore, if we were to pour water into the Sun, we would actually be providing fuel for this star. Instead of extinguishing it, this action would only make the Sun larger, hotter, and much brighter. Water is, in fact, fuel for the Sun. So pouring water onto the Sun is like trying to extinguish a fire with gasoline. The concerning aspect is that the additional mass generated by the water would make the Sun heavier. This is truly a disastrous idea.
If we continue adding water, sooner or later the Sun will collapse on its own, leading to unforeseen catastrophes for other planets and especially for life on Earth.