Had a Conversation About What Makes The Sun Burn and For How Long it Can Go On

I was at work tonight and someone asked me, "What make the sun keep burning?"
Which made me think of the Choo Choo la Rouge song called, "">The Kind of Noise You Can't Turn Down" where the lyrics go, "The sun is gonna burn out in just about a billion years or so.--"

Well, as it turns out, after doing some quick iphone google research...the sun is actually going to burn out in about 4 billion years....and what keeps the sun burning is that it is like a thermonuclear bomb. Hydrogen atoms fuse together to make helium atoms and the nuclear reaction produces heat and light.

And that is what keeps the sun burning. Thank you and good night.