Hi, while I'm no pastor, I did attend Bible college for a while and the rest I've picked up over the years reading books and listening to others speak on matters such as this. First of all, God is Omnipresent, meaning everywhere; also, the creator of all things. Satan, is a fallen angel who God gave the boot from Heaven ( layman's terms ). I consulted with my trusted advisor on this question and this is what he told me: "Mark, God is everywhere and sees all things--good and bad; the devil's presence can be present most everywhere also, but not in the physical sense as we know it. As far as them being on another planet watching us, his answer was a resounding "no." As humans, our minds have limited capability to understand things we can't actually see or touch; that is where our faith steps in to help guide us. In our limited human lifespan, I don't believe God will ever let us know the answers to some questions we have. It would be interesting to hear what others have to say on this also. Take care, Mark