Eternity

All of those that understand eternity, raise your hand. I thought so, none of you do & this is where the discussion becomes interesting. The only thing in my entire life which gives me any understanding of eternity is looking into the sky at night, like I did with my nephew last week. There is no possible way that the sky ends & it drives me crazy trying to understand that concept. How can that be possible? If you have a grasp of this & can explain it to me without saying the universe ends & there is nothing else (which is foolish to think by the way), then let me know because the concept of eternity is fascinating & overwhelming at the same time.