But is a archive not better, when it can be seen? Imagine humanity is no more, but up there in orbit, a satellite similar in Size to Hubble contains all the da

But is a archive not better, when it can be seen? Imagine humanity is no more, but up there in orbit, a satellite similar in Size to Hubble contains all the data humanity ever produced. It observes the neighborhood, on the look out for likely orbits in the habitable zone, deduces planets. And when it has found a candidate, it beams a laser at the estimated position at arrival time, sending a cultural dump over the ocean of space and time. A lighthouse and a graveyard candle at the same time. And if hardened against the eventuality of failure properly, somewhere, sometimes in the far future, some alien might look up at the night-sky and see a flickering, traveling disc of light, seemingly flying fast with the speed of planetary rotation. That would be a monument with purpose. Giving others all the knowledge we had, as a gift, to do better.