This is the most complex topic you will ever talk about.
You can't define the God who created the universe with research and common sense but I can only guarantee you the only way to know that God and that's through Jesus Christ.God who created the whole universe has become a mystery to science and science can never find him nor know about him because our sense can't comprehend God existence.But God himself who created the universe revealed himself to us through Jesus Christ . Follow Jesus and you will see God who created the universe.You can never find him outside Jesus and this is what science don't know.Even if they find him for billions of years they can't see him he will forever remain a mystery.