3 ms·

I mean that we should spot other homeworlds being busted across the galaxy.

• krapp 13y ago
  There are billions of galaxies, though, and my point is we may still be half-blind, since we've only recently even able to detect exoplanets smaller than Jupiter IIRC. And, if we did see something, we would likely interpret it as a natural event. It would probably be in the best self-interests of whatever species launched an attack to make it appear like a natural event in any case, so as not to draw attention to their existence from unknown parties (like us.) And a collision that could wipe out a civilization is clearly within the realm of natural possibility since it's happened on Earth in the past (without the civilization part..) so it need not necessarily draw attention to itself.