when will the world end because it will be the sun when it dies ?

Question: when will the world end because it will be the sun when it dies ?
- Keywords:
  end of the world,
  future,
  sun
Asked by willb to Claire, Elizabeth, Manolis, Mark, Zach on 8 Mar 2014.
- Zach Dixon answered on 8 Mar 2014:
  
  This is a tricky one!
  
  We don’t know for sure when the world will end or if it even will!
  
  You are right though, the most likely cause of the end of the world would be if the sun dies, it is vital for life on Earth.
  
  Hopefully we will have mastered space travel before that time comes so we can continue the human race on other planets!

Question: when will the world end because it will be the sun when it dies ?