Erased it or threw it out because I thought it was wrong. I still have the diagram I drew though and I wrote down all the givens. Tbh, the more I think about it the more lost I get. No idea where to start without a velocity.
Homework Statement
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)...