1. The problem statement, all variables and given/known data Planets A and B are 10 light years apart in the reference frame of planet A. A deep-space probe is launched from A, and 5 years later (in reference frame A) a similar probe is launched from B. Does a reference frame exist in which these two events (a) are simultaneous and (b) occur at the same position. *Note*: Parts (a) and (b) are separate from each other so, you have to find one reference frame where they are simultaneous and then another where they occur at the same position. Δx = 10 Ly, T@Event 1 = 0 years, T@Event 2 = 5 years. 2. Relevant equations In the textbook this is part of the time dilation section so... Tb = γTa, Lorentz Transformations, s2 = (cΔt)2 - Δx2 ? 3. The attempt at a solution I tried to solve it using the space-time interval but, I think it might have something to do with the Lorentz Transformations and Time Dilation equations. Thanks for your help.