7 ms·

Sending seems a lot more risky than receiving.

• sevenless 10y ago
  Risky for what? Alien invasion? If interstellar travel were that easy or worthwhile they'd be here already, especially what with terrestrial radio broadcasts.
  • xyzzy123 10y ago
    If your argument is that terrestrial radio broadcasts mean we don't need the laser... then why do we need the laser? Re: interstellar invasion, perhaps not, but hard to rule out the possibility that the response we get to our broadcasts is something like a relativistic projectile.
  • deleted 10y ago
    [deleted]
  • jcoffland 10y ago
    The universe is a big place and we are a tiny planet. It's very likely we could remain unseen even in a highly active interstellar community. Announcing our presence could have consequences, or not.