how long do does it take until the sun burns out

Question: how long do does it take until the sun burns out
- Keywords:
  sun
Asked by 284brna28 to Áine, Ciarán, Eoin, Lydia, Victoria on 17 Nov 2014.
- Lydia Bach answered on 17 Nov 2014:
  
  Hey!
  
  We are in the most stable period of our star/ sun right now. When the sun runs out of hydrogen it will become a red giant and its outer layers will expand and ultimately engulf the earth!
  This is going to happen in 5 billion years from now – not any time soon.
- Ciarán O'Brien answered on 18 Nov 2014:
  
  We have about 5 billion years left from the sun before it goes kaput. It’s been burning for the last 4.5 billion years so it’s more of less middle-aged. It’s going nowhere for now 🙂

Question: how long do does it take until the sun burns out