1. The problem statement, all variables and given/known data[/b] Just need some help getting started on what looks like a rather simple problem! A rocket travels to a star 5 light years distant, observers on the star time the journey at 6years. I need to find the time recorded on a clock aboard the rocket and the distance to the star in the rockets reference frame. 2. Relevant equations t(observer) = t(rocket) / Sqrt 1-v^2/c^2 so i can rearrange for t(rocket) but the problem i have is that there are two variables missing t(rocket) - the one i need to find and v the velocity of the rocket. This also prevents me from calculating the Lorentz Factor using the normal LF eqn. 3. The attempt at a solution I have (sort of) calculated the LF by using 6years / 5 light years = 1.2 ie trying to find the ratio between the distand and observed time then applied taht to the 10light years to get 8.33 for proper time on the rocket. But I am sure this is incorrect, any guidance would be appreciated, thank you. Please also accept apologies if this is not worded correctly, this is my first post.