Why the sunlight never go off? It gonna be off one day? How long it will take?

Question

Why the sunlight never go off? It gonna be off one day? How long it will take?

Answer 1

Sun is a star. Like every star it have it's own life. So, it can die sometime. The death of a star depends on quantity of energy it have, and which nuclear reactions take place inside it. If the energy is high (red giant)the star can explode in a fenomenon called supernova. That isn't the case of our Sun. It is a star in the G class of energy, and it will die after many millions years like a "brown dwarf".



Also, about the nuclear reactions in a star, I can tell you that the chain is the following:



H + H -----> He

He + He + He -----> C

C transforms in Fe,



where H - Hydrogen, He - Helium, C - Carbon, Fe - Iron

Answer 2

In about 5 billion years our sun will die because it would have used up all it's usable hydrogen. But we'll be long gone by then.

Answer 3

The sun is a star and eventually it will be gone, however thats in billions of years, so I wouldn't worry too much about it.