Hi. I'm not a student of physics, so please forgive me for my ignorance. I only have a very simple question. If the observable universe is about 93 billion light years in diameter, how could the universe have reached that size in only 13.7 billion light years? Doesn't it stand to reason that the size of the universe is only 27.4 billion light years in diameter, OR it's about 41 billion years old? Is this a stupid question?