Thanks Nabeshin ! I definitely learned some new from you .Sometimes some questions mighty look somewhat jokingly , but it can be of great importance to the person asking it . Thanks once again .
I'm asking for the sake knowing . These questions came into my mind today when i was reading one Astronomy book . I'm really interested in these questions and believe that there no which is foolish . I will quote from Einstein who say " The most important thing is never to stop questioning " .
Why do we have only one sun and moon on planet Earth , while there are more than one sun on other planets ? Is there a possibility that one day in the future we might have another sun or moon on planet Earth ?