A hole in the dust disk surrounding our solar system would tell alien observers there are planets here, a new simulation shows. The new model, which tracks thousands of tiny particles beyond the orbit of Neptune, could help astronomers work out the properties of planets in other stars’ dust disks.

If they're flying around in our skies, interfering with our land based ICBM's electronics, and abducting people, then it's a safe bet they already know we're here. Right?  Or am I reading too much into it?  To read the rest of the article, click here.