I have by no means any education on the question I am about to ask. I have looked on the internet and find myself here, signing up for an account to see if anyone can point me to any research on the subject. I thank you in advance for any help that is in layman terms. Scenario: 3 planets. 1,2,3. Planet 2 can see planets 1 and 2 but planets 1 and 3 are only visible to each other briefly, like only a minute to each other daily. Is this possible and where can I research this scenario? If I need to make this a theory that is not possible but fun to entertain, a "what if" if you will I can. This is for a possible book I am thinking on writing and want to be at least close to a theory or fact. I appreciate your time in reading my post and possibly responding.