Five billion years from now, the hydrogen in our Sun's core will be exhausted and the Sun will expand into a red giant.

Question

Quizplus · Accepted Answer

This is a well-established theory in astrophysics known as stellar evolution. As the hydrogen fuel in the Sun's core runs out, the core will contract and heat up, causing the outer layers of the Sun to expand and cool down, eventually becoming a red giant. This process is predicted to occur in about 5 billion years from now.

Five Billion Years from Now, the Hydrogen in Our Sun's