For about a billion years, the sun will burn as a red giant. Then, the hydrogen in that outer core will deplete, leaving an abundance of helium. ... Astronomers estimate that the sun has about 7 billion to 8 billion years left before it sputters out and dies.

What will happen if the sun stops burning?

As the planet heats up, the water on the surface of our planet will begin to evaporate. ... This will mark the beginning of the evaporation of our oceans. By the time the sun stops burning hydrogen in its core, Mars will be in the habitable zone, and the Earth will be much too hot to maintain water on its surface.

How long will the sun still burn?

Stars like our Sun burn for about nine or 10 billion years. So our Sun is about halfway through its life. But don't worry. It still has about 5,000,000,000—five billion—years to go.