Our nearest other star is 4 light years away. 1000 light years away may still not cover many planets good for ET to colonize. But for us now to see evidence of a colony on a planet 1000 light years away or more would be TOUGH.
Note: The planet hunters mostly don't actually see the planets but just shadows or evidence in star wobbles, etc.
But we are putting up some new telescopes with some astounding resolution, etc.
Our nearest other star is 4 light years away. 1000 light years away may still not cover many planets good for ET to colonize. But for us now to see evidence of a colony on a planet 1000 light years away or more would be TOUGH.
Note: The planet hunters mostly don't actually see the planets but just shadows or evidence in star wobbles, etc.
But we are putting up some new telescopes with some astounding resolution, etc.