>the optimal time to launch an interstellar probe, and the punchline was that embarking too soon means you will be overtaken by a later vehicle which launched l

>the optimal time to launch an interstellar probe, and the punchline was that embarking too soon means you will be overtaken by a later vehicle which launched later but with better tech. That's the wait calculation https://en.m.wikipedia.org/w/index.php?title=Interstellar_travel&diffonly=true#Wait_calculation https://en.m.wikipedia.org/w/index.php?title=Interstellar_tr...