3 ms·

Something like this would look to the Barnard's star inhabitants a lot like 'Oumuamua

• simonh 8y ago
  Except only a few tens of centimetres across. There might be thousands of them streaming past us all the time and we'd never know.
  • wnkrshm 8y ago
    It's a fascinating idea but I'm not clear on how you would get back data? Modulation of reflected laser light? Active antennas that powerful radio telescopes are looking at?
    • simonh 8y ago
      You send a chain of them and they beam the message back along the chain.