GENERAL KNOWLEDGE

Detailed explanation-1: -Like most stars in our universe, the Sun is on the main sequence stage of its life. This means nuclear fusion reactions in its core fused hydrogen into helium. However, this process cannot last forever since there is a finite amount of hydrogen in the core of the Sun. Currently it has more than 72% hydrogen.

Detailed explanation-2: -In our case, our Sun releases the energy that we see as sunlight on Earth. So, it burns hydrogen into helium and releases energy. Typically, stars go through this “main sequence” for about 95% of its life. So for most of our sun’s life, it releases energy as sunlight through thermonuclear reactions.