Is there a age limit for being in space if so what are the limits.

Question: Is there a age limit for being in space if so what are the limits.
- Keywords:
  age
Asked by Harry Workman to Rochelle, Michaela, Camilla, Beth, Adrian on 26 Jan 2016.
- Adrianos Golemis answered on 26 Jan 2016:
  
  The oldest Astronaut who flew must have been John Glenn at the age of ~75. In general astronauts fly at younger ages, usually from 35 to 55 years old. This is for fitness, performance and safety reasons mainly.

Question: Is there a age limit for being in space if so what are the limits.