Who is the youngest astronaut to go to space

Question: Who is the youngest astronaut to go to space
- Keywords:
  age
Asked by sammy dodger to Col Op, Elie, Floris, Jenn, RocketRich on 9 Mar 2016. This question was also asked by Sam, RealDaringNote62.
- Floris Van Den Berg answered on 9 Mar 2016:
  
  Gherman Titov, only 25 when he went into space.

Question: Who is the youngest astronaut to go to space