1. The problem statement, all variables and given/known data Planet W is 12ly from earth. Anna and Bob are both 20 years old. Anna travels to planet W at 0.6c, quickly turns around, and returns to earth at 0.6c. How old will Anna and Bob be when Anna gets back? 2. Relevant equations 3. The attempt at a solution I've tried so many things and nothing is working. Apparently Bob is 60 years and Anna is 52 years. I'm completely lost on the idea of twin paradoxes, I could use some serious help. Thank you!