Submission + - How could we actually detect an alien invasion from outer space?
defiant.challenged writes: As I was watching another sci-fi blockbuster about aliens wanting to harvest the life stock population on earth for their energy since we are such a robust species, I was wondering how likely and easy/difficult it would be currently to actually detect an outer space invasion (fleet). I am a firm believer that iff we would be invaded, we would not stand a chance and would probably not even hit a single ship when it comes to fighting them. The aliens in the movie had the capability to space-jump right into our solar system and even very close to earth. My question is how good are we at the moment in detecting an alien ship/fleet that jumps into our solar system. Do we have radio dishes around the globe such that we can detect objects in space in all longitude and latitude degrees? I know we have dishes pointing to the skies but how far can they reach? Do we have blindspots perhaps on the poles? I also wonder if our current means, ie radio signals, are relatively easy to be compromised with our current stealth technology?
To formulate it in more sci-fi terms, how large is our outer space detection grid and with what means do we detect plus what kind of time window can they give us in which I can kiss my loved ones goodbye?
To formulate it in more sci-fi terms, how large is our outer space detection grid and with what means do we detect plus what kind of time window can they give us in which I can kiss my loved ones goodbye?
