Good points. I had never heard that fear of an alien invasion was the reason for aiming at a globular cluster, though. I thought it was to maximize the number of stars that would be hit by the beam (although globular clusters would be about the last place to look for stable planetary systems, or so I would think.) You wouldn't have a reference for that would you?Originally Posted by IsaacKuo
When they get a proper interferometer going, the first step will be to just go through the entire catalogue of known planets and see what you can see.Originally Posted by IsaacKuo
I like your point about the likelihood of space travel possibly rendering the whole SETI debate moot. Maybe the aliens are already here. Or maybe we are the first. But I respect your rocket science skills. Is it possible to build interstellar craft without fusion or antimatter that can travel between stars in a reasonable time?