3 ms·

The sun can be used as a gravitational lens.

• beamatronic 6y ago
  How would you send out a morse-code like signal? like -.-- -.-- --..
  • ant6n 6y ago
    You arrange satellites behind two suns like this: Sat (500AU) sun (N light years) sun (500AU) sat
    • beamatronic 6y ago
      Where do you get 2 suns from?