3 ms·

Lightsail seems sufficiently practical if you don't care about being fast. You basically directly exploit energy of the stars you are traveling between.

• cwillu 3y ago
  The argument is premised on grabby aliens being fast enough to explain why we don't see their expansion; grabby aliens that don't care about being fast would have showed up _long_ ago.
  • scotty79 3y ago
    Maybe we are just really really early