Just because they have come into our solar system doesn't mean that they have been able to be seen. It takes a 8 minutes for light to come from the sun to earth- and that's just a FRACTION of the solar system! We all pretty much know that no human (or alien, for that matter) could go at the speed of light. Not NEAR that fast, I suspect. And these aliens are intellegent, so why would they search every nook and cranny? You can barely see Saturn with your naked eye, so do youthink you will be able to see a SPACESHIP on Saturn EVEN WITH A TELESCOPE??????? Plus, if they are truly intellegent life, then why would they want to talk to US????????????