Psalm 19:1

The Heavens are telling of the glory of God; and the expanse (of heavens) is declaring the work of His hands. 

The earth is complicated in its design, and nature in its beauty expresses the glory of its creator.  The stars that light up the night sky leave us in the wonder of God and His ability to create.  We can only contemplate how it all works, but we can glorify God for His marvelous creation.